<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Mon Aug 10 20:16:18 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="iisf_FounderClassMember" xlink:href="iisf-20250331.xsd#iisf_FounderClassMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="iisf_FounderClassMember_lbl" xml:lang="en-US">Founder Class</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="iisf_FounderClassMember" xlink:to="iisf_FounderClassMember_lbl"/>
    <loc xlink:type="locator" xlink:label="iisf_InvestorClassMember" xlink:href="iisf-20250331.xsd#iisf_InvestorClassMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="iisf_InvestorClassMember_lbl" xml:lang="en-US">Investor Class</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="iisf_InvestorClassMember" xlink:to="iisf_InvestorClassMember_lbl"/>
  </labelLink>
</linkbase>
