<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by DFIN XBRL Schema Document - http://www.dfinsolutions.com/ - on 25-05-2026 02:37:47 AM -->
<!-- Copyright(c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<schema targetNamespace="http://www.blackrock.com/20260522" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:bats="http://www.blackrock.com/20260522" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:srt-types="http://fasb.org/srt-types/2025" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:oef="http://xbrl.sec.gov/oef/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:oef-pre="http://xbrl.sec.gov/oef-pre/2025" xmlns:oef-lab="http://xbrl.sec.gov/oef-lab/2025" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:oef-def="http://xbrl.sec.gov/oef-def/2025" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:srt="http://fasb.org/srt/2025" xmlns:oef-sr="http://xbrl.sec.gov/oef-sr/2025" xmlns:srt-roles="http://fasb.org/srt-roles/2025" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:stpr="http://xbrl.sec.gov/stpr/2025" elementFormDefault="qualified">
	<import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
	<import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
	<import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
	<import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd"/>
	<import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>   
	<import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
	<import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
	<import namespace="http://fasb.org/srt-types/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd"/>
	<import namespace="http://xbrl.sec.gov/oef-sr/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-sr-2025.xsd"/>
	<import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
	<import namespace="http://fasb.org/us-roles/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd"/>
	<import namespace="http://fasb.org/srt-roles/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd"/>
	<annotation>
		<appinfo>
			<link:linkbase id="lnk">
				<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReport" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReport"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportHoldingsDetails"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportLineGraphDetails"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportAverageAnnualReturnDetails"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
				<link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/LargestHoldingOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#LargestHoldingOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/Other1CategoryOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other1CategoryOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#AdditionalIndexOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#BroadBasedIndexOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/Other2CategoryOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other2CategoryOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SalesLoadOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SalesLoadOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/MaturityOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#MaturityOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/IndustrySectorOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#IndustrySectorOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/CreditQualityOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#CreditQualityOnly"/>
				<link:roleRef roleURI="http://xbrl.sec.gov/oef/role/GeographicRegionOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#GeographicRegionOnly"/>
				<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReport">              
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000003891Member" xlink:label="C000003891Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000003891Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000003892Member" xlink:label="C000003892Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000003892Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000003893Member" xlink:label="C000003893Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000003893Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000032703Member" xlink:label="C000032703Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000032703Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000144517Member" xlink:label="C000144517Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000144517Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000146955Member" xlink:label="C000146955Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000146955Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000227189Member" xlink:label="C000227189Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000227189Member" order="8.0" />
				</link:presentationLink>
				<link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000003891Member" xlink:label="C000003891Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000003891Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000003892Member" xlink:label="C000003892Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000003892Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000003893Member" xlink:label="C000003893Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000003893Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000032703Member" xlink:label="C000032703Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000032703Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000144517Member" xlink:label="C000144517Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000144517Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000146955Member" xlink:label="C000146955Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000146955Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_C000227189Member" xlink:label="C000227189Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000227189Member" order="8.0" />   
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="InvestmentTypeCategorizationMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ForeignAgencyObligationsMember" xlink:label="ForeignAgencyObligationsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ForeignAgencyObligationsMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_USTreasuryObligationsMember" xlink:label="USTreasuryObligationsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="USTreasuryObligationsMember" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_ForeignGovernmentObligationsMember" xlink:label="ForeignGovernmentObligationsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ForeignGovernmentObligationsMember" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_PreferredSecuritiesMember" xlink:label="PreferredSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="PreferredSecuritiesMember" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember" xlink:label="MunicipalBondsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="MunicipalBondsMember" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="CorporateBondSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CorporateBondSecuritiesMember" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="AssetBackedSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="AssetBackedSecuritiesMember" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_USGovernmentSponsoredAgencySecuritiesMember" xlink:label="USGovernmentSponsoredAgencySecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="USGovernmentSponsoredAgencySecuritiesMember" order="9.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_NonAgencyMortgageBackedSecuritiesMember" xlink:label="NonAgencyMortgageBackedSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="NonAgencyMortgageBackedSecuritiesMember" order="10.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="FixedIncomeFundsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FixedIncomeFundsMember" order="11.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ShortTermInvestmentsMember" order="12.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_FloatingRateLoanInterestsMember" xlink:label="FloatingRateLoanInterestsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FloatingRateLoanInterestsMember" order="13.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaturityDomain" xlink:label="MaturityDomain"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory1Domain" xlink:label="OtherCategory1Domain"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory2Domain" xlink:label="OtherCategory2Domain"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LargestHoldingsDomain" xlink:label="LargestHoldingsDomain"/>
					<!--GeographicRegionDomain Only presentation and label linkbases-->			 
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_GeographicRegionDomain" xlink:label="GeographicRegionDomain"/>
					<!--IndustrySectorDomain Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/>	
					<link:loc xlink:type="locator" xlink:href="#bats_CorporateSectorMember" xlink:label="CorporateSectorMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="CorporateSectorMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_TobaccoMember" xlink:label="TobaccoMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="TobaccoMember" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_HousingMember" xlink:label="HousingMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="HousingMember" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_EducationMember" xlink:label="EducationMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="EducationMember" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#bats_CountyCitySpecialDistrictSchoolDistrictMember" xlink:label="CountyCitySpecialDistrictSchoolDistrictMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="CountyCitySpecialDistrictSchoolDistrictMember" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_UtilitiesSectorMember" xlink:label="UtilitiesSectorMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="UtilitiesSectorMember" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransportationSectorMember" xlink:label="TransportationSectorMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="TransportationSectorMember" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HealthcareSectorMember" xlink:label="HealthcareSectorMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="HealthcareSectorMember" order="9.0" />
					<!--CreditQualityDomain Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CreditQualityDomain" xlink:label="CreditQualityDomain"/>	
					<link:loc xlink:type="locator" xlink:href="#bats_NRMember" xlink:label="NRMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="NRMember" order="2.0" />
					<!--ExternalCreditRatingFitchMember Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingFitchMember" xlink:label="ExternalCreditRatingFitchMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingFitchMember" xbrldt:usable="false" order="1.0"/>
					<!--ExternalCreditRatingMoodysMember Only presentation and label linkbases-->	
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingMoodysMember" xlink:label="ExternalCreditRatingMoodysMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingMoodysMember" xbrldt:usable="false" order="2.1"/>
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					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingStandardPoorsMember" xlink:label="ExternalCreditRatingStandardPoorsMember"/>
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					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="InvestmentTypeCategorizationMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ForeignAgencyObligationsMember" xlink:label="ForeignAgencyObligationsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ForeignAgencyObligationsMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_USTreasuryObligationsMember" xlink:label="USTreasuryObligationsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="USTreasuryObligationsMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ForeignGovernmentObligationsMember" xlink:label="ForeignGovernmentObligationsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ForeignGovernmentObligationsMember" order="3.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_PreferredSecuritiesMember" xlink:label="PreferredSecuritiesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="PreferredSecuritiesMember" order="4.0"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember" xlink:label="MunicipalBondsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="MunicipalBondsMember" order="5.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_USGovernmentSponsoredAgencySecuritiesMember" xlink:label="USGovernmentSponsoredAgencySecuritiesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="USGovernmentSponsoredAgencySecuritiesMember" order="6.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_NonAgencyMortgageBackedSecuritiesMember" xlink:label="NonAgencyMortgageBackedSecuritiesMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="NonAgencyMortgageBackedSecuritiesMember" order="7.0"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="FixedIncomeFundsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FixedIncomeFundsMember" order="8.0"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ShortTermInvestmentsMember" order="9.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_FloatingRateLoanInterestsMember" xlink:label="FloatingRateLoanInterestsMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FloatingRateLoanInterestsMember" order="10.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly">               
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSAggregateBondIndexMember" xlink:label="BloombergUSAggregateBondIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergUSAggregateBondIndexMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergMunicipalBondIndexMember" xlink:label="BloombergMunicipalBondIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergMunicipalBondIndexMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSUniversalIndexMember" xlink:label="BloombergUSUniversalIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergUSUniversalIndexMember" order="3.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly">              
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSCreditIndexMember" xlink:label="BloombergUSCreditIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BloombergUSCreditIndexMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergMBSIndexMember" xlink:label="BloombergMBSIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BloombergMBSIndexMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ICEBofA13YearUSTreasuryIndexMember" xlink:label="ICEBofA13YearUSTreasuryIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofA13YearUSTreasuryIndexMember" order="3.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSTreasury710YearBondIndexMember" xlink:label="BloombergUSTreasury710YearBondIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BloombergUSTreasury710YearBondIndexMember" order="4.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSBellwether10YearSwapIndexMember" xlink:label="BloombergUSBellwether10YearSwapIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BloombergUSBellwether10YearSwapIndexMember" order="5.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_CustomizedReferenceBenchmarkMember" xlink:label="CustomizedReferenceBenchmarkMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="CustomizedReferenceBenchmarkMember" order="6.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergMunicipalHighYieldBondIndexMember" xlink:label="BloombergMunicipalHighYieldBondIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BloombergMunicipalHighYieldBondIndexMember" order="7.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ReferenceBenchmarkMember" xlink:label="ReferenceBenchmarkMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="ReferenceBenchmarkMember" order="8.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_SIFMAMunicipalSwapIndexMember" xlink:label="SIFMAMunicipalSwapIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="SIFMAMunicipalSwapIndexMember" order="9.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/MaturityOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaturityDomain" xlink:label="MaturityDomain"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/IndustrySectorOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/>
					<link:loc xlink:type="locator" xlink:href="#bats_CorporateSectorMember" xlink:label="CorporateSectorMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="CorporateSectorMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_TobaccoMember" xlink:label="TobaccoMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="TobaccoMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_HousingMember" xlink:label="HousingMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="HousingMember" order="3.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_EducationMember" xlink:label="EducationMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="EducationMember" order="4.0"/>
					<link:loc xlink:type="locator" xlink:href="#bats_CountyCitySpecialDistrictSchoolDistrictMember" xlink:label="CountyCitySpecialDistrictSchoolDistrictMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="CountyCitySpecialDistrictSchoolDistrictMember" order="5.0"/>
				</link:definitionLink>
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CreditQualityOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CreditQualityDomain" xlink:label="CreditQualityDomain"/>
					<link:loc xlink:type="locator" xlink:href="#bats_NRMember" xlink:label="NRMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="CreditQualityDomain" xlink:to="NRMember" order="1.0"/>
				</link:definitionLink>
				<!--GeographicRegionOnly use only for STPR-->
				<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/GeographicRegionOnly">
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_GeographicRegionDomain" xlink:label="GeographicRegionDomain"/>
				</link:definitionLink>
				<link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">               
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSAggregateBondIndexMember" xlink:label="BloombergUSAggregateBondIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergUSAggregateBondIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg U S Aggregate Bond Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergUSAggregateBondIndexMember" xlink:to="label_BloombergUSAggregateBondIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSCreditIndexMember" xlink:label="BloombergUSCreditIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergUSCreditIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg U S Credit Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergUSCreditIndexMember" xlink:to="label_BloombergUSCreditIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ForeignAgencyObligationsMember" xlink:label="ForeignAgencyObligationsMember"/>
					<link:label xlink:type="resource" xlink:label="label_ForeignAgencyObligationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Foreign Agency Obligations [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignAgencyObligationsMember" xlink:to="label_ForeignAgencyObligationsMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_USTreasuryObligationsMember" xlink:label="USTreasuryObligationsMember"/>
					<link:label xlink:type="resource" xlink:label="label_USTreasuryObligationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">U S Treasury Obligations [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="USTreasuryObligationsMember" xlink:to="label_USTreasuryObligationsMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ForeignGovernmentObligationsMember" xlink:label="ForeignGovernmentObligationsMember"/>
					<link:label xlink:type="resource" xlink:label="label_ForeignGovernmentObligationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Foreign Government Obligations [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignGovernmentObligationsMember" xlink:to="label_ForeignGovernmentObligationsMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_PreferredSecuritiesMember" xlink:label="PreferredSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_PreferredSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Preferred Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PreferredSecuritiesMember" xlink:to="label_PreferredSecuritiesMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000003891Member" xlink:label="C000003891Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000003891Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000003891 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000003891Member" xlink:to="label_C000003891Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000003891Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series C Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000003891Member" xlink:to="label_C000003891Member_2"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember" xlink:label="MunicipalBondsMember"/>
					<link:label xlink:type="resource" xlink:label="label_MunicipalBondsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Municipal Bonds [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MunicipalBondsMember" xlink:to="label_MunicipalBondsMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="CorporateBondSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_CorporateBondSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Corporate Bond Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CorporateBondSecuritiesMember" xlink:to="label_CorporateBondSecuritiesMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsAAARatingMember" xlink:label="StandardPoorsAAARatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsAAARatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, AAA Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsAAARatingMember" xlink:to="label_StandardPoorsAAARatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsAARatingMember" xlink:label="StandardPoorsAARatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsAARatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, AA Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsAARatingMember" xlink:to="label_StandardPoorsAARatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsARatingMember" xlink:label="StandardPoorsARatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsARatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, A Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsARatingMember" xlink:to="label_StandardPoorsARatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsBBBRatingMember" xlink:label="StandardPoorsBBBRatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsBBBRatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, BBB Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsBBBRatingMember" xlink:to="label_StandardPoorsBBBRatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="AssetBackedSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_AssetBackedSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Asset-Backed Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetBackedSecuritiesMember" xlink:to="label_AssetBackedSecuritiesMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000003892Member" xlink:label="C000003892Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000003892Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000003892 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000003892Member" xlink:to="label_C000003892Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000003892Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series M Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000003892Member" xlink:to="label_C000003892Member_2"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergMBSIndexMember" xlink:label="BloombergMBSIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergMBSIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg MBS Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergMBSIndexMember" xlink:to="label_BloombergMBSIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_USGovernmentSponsoredAgencySecuritiesMember" xlink:label="USGovernmentSponsoredAgencySecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_USGovernmentSponsoredAgencySecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">U S Government Sponsored Agency Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="USGovernmentSponsoredAgencySecuritiesMember" xlink:to="label_USGovernmentSponsoredAgencySecuritiesMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_NonAgencyMortgageBackedSecuritiesMember" xlink:label="NonAgencyMortgageBackedSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_NonAgencyMortgageBackedSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Non Agency Mortgage Backed Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonAgencyMortgageBackedSecuritiesMember" xlink:to="label_NonAgencyMortgageBackedSecuritiesMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_NRMember" xlink:label="NRMember"/>
					<link:label xlink:type="resource" xlink:label="label_NRMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">N R [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NRMember" xlink:to="label_NRMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ICEBofA13YearUSTreasuryIndexMember" xlink:label="ICEBofA13YearUSTreasuryIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_ICEBofA13YearUSTreasuryIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">ICE BofA 1 3 Year U S Treasury Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ICEBofA13YearUSTreasuryIndexMember" xlink:to="label_ICEBofA13YearUSTreasuryIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000003893Member" xlink:label="C000003893Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000003893Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000003893 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000003893Member" xlink:to="label_C000003893Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000003893Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series S Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000003893Member" xlink:to="label_C000003893Member_2"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsBBRatingMember" xlink:label="StandardPoorsBBRatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsBBRatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, BB Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsBBRatingMember" xlink:to="label_StandardPoorsBBRatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="FixedIncomeFundsMember"/>
					<link:label xlink:type="resource" xlink:label="label_FixedIncomeFundsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Fixed Income Funds [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FixedIncomeFundsMember" xlink:to="label_FixedIncomeFundsMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:label xlink:type="resource" xlink:label="label_ShortTermInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Short-Term Investments [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermInvestmentsMember" xlink:to="label_ShortTermInvestmentsMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000032703Member" xlink:label="C000032703Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000032703Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000032703 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000032703Member" xlink:to="label_C000032703Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000032703Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series P Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000032703Member" xlink:to="label_C000032703Member_2"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSTreasury710YearBondIndexMember" xlink:label="BloombergUSTreasury710YearBondIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergUSTreasury710YearBondIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg U S Treasury 7 10 Year Bond Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergUSTreasury710YearBondIndexMember" xlink:to="label_BloombergUSTreasury710YearBondIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSBellwether10YearSwapIndexMember" xlink:label="BloombergUSBellwether10YearSwapIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergUSBellwether10YearSwapIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg U S Bellwether 10 Year Swap Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergUSBellwether10YearSwapIndexMember" xlink:to="label_BloombergUSBellwether10YearSwapIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_CorporateSectorMember" xlink:label="CorporateSectorMember"/>
					<link:label xlink:type="resource" xlink:label="label_CorporateSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Corporate Sector [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CorporateSectorMember" xlink:to="label_CorporateSectorMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_CustomizedReferenceBenchmarkMember" xlink:label="CustomizedReferenceBenchmarkMember"/>
					<link:label xlink:type="resource" xlink:label="label_CustomizedReferenceBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Customized Reference Benchmark [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CustomizedReferenceBenchmarkMember" xlink:to="label_CustomizedReferenceBenchmarkMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergMunicipalHighYieldBondIndexMember" xlink:label="BloombergMunicipalHighYieldBondIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergMunicipalHighYieldBondIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Municipal High Yield Bond Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergMunicipalHighYieldBondIndexMember" xlink:to="label_BloombergMunicipalHighYieldBondIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergMunicipalBondIndexMember" xlink:label="BloombergMunicipalBondIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergMunicipalBondIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Municipal Bond Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergMunicipalBondIndexMember" xlink:to="label_BloombergMunicipalBondIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_TobaccoMember" xlink:label="TobaccoMember"/>
					<link:label xlink:type="resource" xlink:label="label_TobaccoMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Tobacco [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TobaccoMember" xlink:to="label_TobaccoMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_HousingMember" xlink:label="HousingMember"/>
					<link:label xlink:type="resource" xlink:label="label_HousingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Housing [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HousingMember" xlink:to="label_HousingMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_EducationMember" xlink:label="EducationMember"/>
					<link:label xlink:type="resource" xlink:label="label_EducationMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Education [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EducationMember" xlink:to="label_EducationMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_CountyCitySpecialDistrictSchoolDistrictMember" xlink:label="CountyCitySpecialDistrictSchoolDistrictMember"/>
					<link:label xlink:type="resource" xlink:label="label_CountyCitySpecialDistrictSchoolDistrictMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">County City Special District School District [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CountyCitySpecialDistrictSchoolDistrictMember" xlink:to="label_CountyCitySpecialDistrictSchoolDistrictMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000144517Member" xlink:label="C000144517Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000144517Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000144517 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000144517Member" xlink:to="label_C000144517Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000144517Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series E Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000144517Member" xlink:to="label_C000144517Member_2"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransportationSectorMember" xlink:label="TransportationSectorMember"/>
					<link:label xlink:type="resource" xlink:label="label_TransportationSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Transportation Sector [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TransportationSectorMember" xlink:to="label_TransportationSectorMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HealthcareSectorMember" xlink:label="HealthcareSectorMember"/>
					<link:label xlink:type="resource" xlink:label="label_HealthcareSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Healthcare Sector [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HealthcareSectorMember" xlink:to="label_HealthcareSectorMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsBRatingMember" xlink:label="StandardPoorsBRatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsBRatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, B Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsBRatingMember" xlink:to="label_StandardPoorsBRatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsCCCRatingMember" xlink:label="StandardPoorsCCCRatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsCCCRatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, CCC Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsCCCRatingMember" xlink:to="label_StandardPoorsCCCRatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsCCRatingMember" xlink:label="StandardPoorsCCRatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsCCRatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, CC Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsCCRatingMember" xlink:to="label_StandardPoorsCCRatingMember"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StandardPoorsCRatingMember" xlink:label="StandardPoorsCRatingMember"/>
					<link:label xlink:type="resource" xlink:label="label_StandardPoorsCRatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Standard &amp; Poor&apos;s, C Rating [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StandardPoorsCRatingMember" xlink:to="label_StandardPoorsCRatingMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000146955Member" xlink:label="C000146955Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000146955Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000146955 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000146955Member" xlink:to="label_C000146955Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000146955Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series A Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000146955Member" xlink:to="label_C000146955Member_2"/>
					<link:loc xlink:type="locator" xlink:href="#bats_FloatingRateLoanInterestsMember" xlink:label="FloatingRateLoanInterestsMember"/>
					<link:label xlink:type="resource" xlink:label="label_FloatingRateLoanInterestsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Floating Rate Loan Interests [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FloatingRateLoanInterestsMember" xlink:to="label_FloatingRateLoanInterestsMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_BloombergUSUniversalIndexMember" xlink:label="BloombergUSUniversalIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BloombergUSUniversalIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg U S Universal Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergUSUniversalIndexMember" xlink:to="label_BloombergUSUniversalIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_ReferenceBenchmarkMember" xlink:label="ReferenceBenchmarkMember"/>
					<link:label xlink:type="resource" xlink:label="label_ReferenceBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Reference Benchmark [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReferenceBenchmarkMember" xlink:to="label_ReferenceBenchmarkMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_SIFMAMunicipalSwapIndexMember" xlink:label="SIFMAMunicipalSwapIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_SIFMAMunicipalSwapIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">SIFMA Municipal Swap Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SIFMAMunicipalSwapIndexMember" xlink:to="label_SIFMAMunicipalSwapIndexMember"/>
					<link:loc xlink:type="locator" xlink:href="#bats_C000227189Member" xlink:label="C000227189Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000227189Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000227189 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000227189Member" xlink:to="label_C000227189Member"/>
										<link:label xlink:type="resource" xlink:label="label_C000227189Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">BATS: Series V Portfolio</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000227189Member" xlink:to="label_C000227189Member_2"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="InvestmentTypeAxis"/>
					<link:label xlink:type="resource" xlink:label="label_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investment Type [Axis]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentTypeAxis" xlink:to="label_InvestmentTypeAxis" priority="1"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="AssetsNet"/>
					<link:label xlink:type="resource" xlink:label="label_AssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Net Assets</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetsNet" xlink:to="label_AssetsNet" priority="1"/>
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="InvestmentCompanyPortfolioTurnover"/>
					<link:label xlink:type="resource" xlink:label="label_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investment Company Portfolio Turnover</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentCompanyPortfolioTurnover" xlink:to="label_InvestmentCompanyPortfolioTurnover" priority="1"/>                
					<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag" xlink:label="dei_NoTradingSymbolFlag"/>
					<link:label xlink:type="resource" xlink:label="label_NoTradingSymbolFlag" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">No Trading Symbol Flag</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_NoTradingSymbolFlag" xlink:to="label_NoTradingSymbolFlag" priority="1"/>		
				</link:labelLink>
			</link:linkbase>
		</appinfo>
	</annotation>   
	<element name="BloombergUSAggregateBondIndexMember" id="bats_BloombergUSAggregateBondIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergUSCreditIndexMember" id="bats_BloombergUSCreditIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ForeignAgencyObligationsMember" id="bats_ForeignAgencyObligationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="USTreasuryObligationsMember" id="bats_USTreasuryObligationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ForeignGovernmentObligationsMember" id="bats_ForeignGovernmentObligationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="PreferredSecuritiesMember" id="bats_PreferredSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000003891Member" id="bats_C000003891Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000003892Member" id="bats_C000003892Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergMBSIndexMember" id="bats_BloombergMBSIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="USGovernmentSponsoredAgencySecuritiesMember" id="bats_USGovernmentSponsoredAgencySecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="NonAgencyMortgageBackedSecuritiesMember" id="bats_NonAgencyMortgageBackedSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="NRMember" id="bats_NRMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ICEBofA13YearUSTreasuryIndexMember" id="bats_ICEBofA13YearUSTreasuryIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000003893Member" id="bats_C000003893Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000032703Member" id="bats_C000032703Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergUSTreasury710YearBondIndexMember" id="bats_BloombergUSTreasury710YearBondIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergUSBellwether10YearSwapIndexMember" id="bats_BloombergUSBellwether10YearSwapIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CorporateSectorMember" id="bats_CorporateSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CustomizedReferenceBenchmarkMember" id="bats_CustomizedReferenceBenchmarkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergMunicipalHighYieldBondIndexMember" id="bats_BloombergMunicipalHighYieldBondIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergMunicipalBondIndexMember" id="bats_BloombergMunicipalBondIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="TobaccoMember" id="bats_TobaccoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="HousingMember" id="bats_HousingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="EducationMember" id="bats_EducationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CountyCitySpecialDistrictSchoolDistrictMember" id="bats_CountyCitySpecialDistrictSchoolDistrictMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000144517Member" id="bats_C000144517Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000146955Member" id="bats_C000146955Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="FloatingRateLoanInterestsMember" id="bats_FloatingRateLoanInterestsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BloombergUSUniversalIndexMember" id="bats_BloombergUSUniversalIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="ReferenceBenchmarkMember" id="bats_ReferenceBenchmarkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="SIFMAMunicipalSwapIndexMember" id="bats_SIFMAMunicipalSwapIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000227189Member" id="bats_C000227189Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
</schema>
