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        <Explanation>CHANGE IN BENEFIT OBLIGATIONS 412719. MEDICARE PART D SUBSIDY 288861.</Explanation>
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      <SupplementalNonqualRetirePlan>0</SupplementalNonqualRetirePlan>
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        <Title>Trustee</Title>
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      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 3</ReturnReference>
        <Explanation>Line 3 explanation - BENEFITS MANAGEMENT GROUP, INC. IS THE THIRD PARTY ADMINISTRATOR HIRED TO ADMINISTER THE FUND'S DAY-TO-DAY OPERATIONS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 11</ReturnReference>
        <Explanation>THE TRUSTEES AUTHORIZE THE FUND'S THIRD-PARTY ADMINISTRATOR AND A DESIGNATED TRUSTEE TO REVIEW THE FORM 990 BEFORE IT IS FILED.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 12c</ReturnReference>
        <Explanation>THE TRUSTEES ARE GOVERNED BY THE TRUST DOCUMENT AND A WRITTEN POLICY AND HAVE A FIDUCIARY RESPONSIBILITY UNDER ERISA TO ADMINISTER THE PLAN IN THE BEST INTEREST OF THE MEMBERSHIP. THE U.S. DEPARTMENT OF LABOR REQUIRES ALL LABOR TRUSTEES TO REPORT ON FORM LM-30 POTENTIAL SITUATIONS WHERE THERE MAY BE CONFLICTS OF INTEREST. THIS INFORMATION IS OPEN TO THE PUBLIC.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section C, line 19</ReturnReference>
        <Explanation>A SUMMARY ANNUAL REPORT IS DISTRIBUTED TO ALL PARTICIPANTS. PARTICIPANTS ARE ABLE TO REQUEST THE AUDITOR'S REPORT AND OTHER FINANCIAL INFORMATION FROM THE PLAN ADMINISTRATOR AND/OR THE U.S. DEPARTMENT OF LABOR. ALSO, FORM 5500 IS OPEN TO PUBLIC INSPECTION THROUGH THE U.S. DEPARTMENT OF LABOR.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>PART XII, LINE 2C</ReturnReference>
        <Explanation>THERE HAS BEEN NO CHANGE THE FUND'S PROCESS FROM THE PRIOR YEAR IN REGARDS TO THE OVERSIGHT PROCESS.</Explanation>
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          <BusinessNameLine1>IRONWORKERS LOCAL 63 PENSION FUND</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>1520 Kensington Suite 200</AddressLine1>
          <City>OAKBROOK</City>
          <State>IL</State>
          <ZIPCode>60523</ZIPCode>
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        <EIN>363519910</EIN>
        <PrimaryActivities>PENSION FUND</PrimaryActivities>
        <LegalDomicileState>IL</LegalDomicileState>
        <ExemptCodeSection>401 (A)</ExemptCodeSection>
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          <BusinessNameLine1>IRONWORKERS LOCAL 63 UNION</BusinessNameLine1>
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          <BusinessNameLine1>IRONWORKERS LOCAL 63 TRAINING SCHOOL</BusinessNameLine1>
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          <BusinessNameLine1>4-S ERECTION INC</BusinessNameLine1>
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      <Form990ScheduleRPartIV>
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          <BusinessNameLine1>ACORN FENCE &amp; CONSTRUCTION INC</BusinessNameLine1>
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      <Form990ScheduleRPartIV>
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          <BusinessNameLine1>ACTION FENCE CONTRACTORS INC</BusinessNameLine1>
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      <Form990ScheduleRPartIV>
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          <BusinessNameLine1>ADL INSTALLERS INC</BusinessNameLine1>
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      <Form990ScheduleRPartIV>
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          <BusinessNameLine1>ADVANCE STEEL ERECTION INC</BusinessNameLine1>
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      <Form990ScheduleRPartIV>
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          <BusinessNameLine1>ALLIANCE FENCE CORPORATION</BusinessNameLine1>
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          <BusinessNameLine1>ALLIANCE GLASS &amp; METAL INC</BusinessNameLine1>
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          <BusinessNameLine1>AMERICAN ENCLOSURES INC</BusinessNameLine1>
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          <BusinessNameLine1>AMERICAN STEELWORKS INC</BusinessNameLine1>
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          <BusinessNameLine1>ANAGNOS DOOR CO INC</BusinessNameLine1>
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      <Form990ScheduleRPartIV>
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          <BusinessNameLine1>ANTAMEX INC</BusinessNameLine1>
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          <BusinessNameLine1>ARCADIA GLASS &amp; CLADDINGKREZ GROUP</BusinessNameLine1>
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          <BusinessNameLine1>ARCHITECTURAL PANEL SYSTEMS INC</BusinessNameLine1>
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          <BusinessNameLine1>ARCHITECTURAL SYSTEMS INC</BusinessNameLine1>
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          <BusinessNameLine1>ARCWALL</BusinessNameLine1>
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          <BusinessNameLine1>AREA ERECTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>ARTEC MIDWEST INC</BusinessNameLine1>
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          <BusinessNameLine1>ASC WINDOW CORPORATION</BusinessNameLine1>
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          <BusinessNameLine1>AUBURN CORPORATION</BusinessNameLine1>
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          <BusinessNameLine1>AUTOMATIC DOORS INC</BusinessNameLine1>
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          <BusinessNameLine1>B &amp; D CONTRACTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>BAKES STEEL ERECTORS</BusinessNameLine1>
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          <BusinessNameLine1>BERGLUND CONSTRUCTION COMPANY</BusinessNameLine1>
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          <BusinessNameLine1>BLUE SKY LLC</BusinessNameLine1>
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          <BusinessNameLine1>BUILDERS CHICAGO CORP</BusinessNameLine1>
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          <BusinessNameLine1>BUILT BEST FENCE INC</BusinessNameLine1>
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          <BusinessNameLine1>C &amp; B GLASS INC</BusinessNameLine1>
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          <BusinessNameLine1>CANNON EQUIPMENT CO</BusinessNameLine1>
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          <BusinessNameLine1>CELTIC IRON INC</BusinessNameLine1>
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          <BusinessNameLine1>CHICAGO FLYHOUSE INC</BusinessNameLine1>
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          <BusinessNameLine1>CHICAGO HEIGHTS CONSTRUCTION CO</BusinessNameLine1>
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          <BusinessNameLine1>CHICAGO SPOTLIGHT INC</BusinessNameLine1>
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          <BusinessNameLine1>CHICAGO STEEL CONSTRUCTION LLC</BusinessNameLine1>
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          <BusinessNameLine1>CHRISTOPHER GLASS &amp; ALUMINUM</BusinessNameLine1>
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          <BusinessNameLine1>CK II CONTRACTING INC</BusinessNameLine1>
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          <BusinessNameLine1>COMPOSITE STEEL PRODUCTS INC</BusinessNameLine1>
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          <BusinessNameLine1>CONDOR ERECTION</BusinessNameLine1>
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          <BusinessNameLine1>CORSETTI STRUCTURAL STEEL INC</BusinessNameLine1>
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          <BusinessNameLine1>CSC ALUMINUM &amp; GLASS INC</BusinessNameLine1>
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          <BusinessNameLine1>CUSTOM WINDOW</BusinessNameLine1>
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          <BusinessNameLine1>D &amp; M ARCHITECTURAL METALS INC</BusinessNameLine1>
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          <BusinessNameLine1>DALTON FENCE LLC</BusinessNameLine1>
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          <BusinessNameLine1>DEPASQUALE STEEL ERECTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>DOOR SYSTEMS INC</BusinessNameLine1>
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          <BusinessNameLine1>DORAL CORP</BusinessNameLine1>
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          <BusinessNameLine1>DORMA USA</BusinessNameLine1>
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          <BusinessNameLine1>DUBURG IRON WORKS INC</BusinessNameLine1>
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          <BusinessNameLine1>DUROWELD COMPANY INC</BusinessNameLine1>
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          <BusinessNameLine1>DYNAMIC IRON INC</BusinessNameLine1>
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          <BusinessNameLine1>EASTERN CONSTRUCTION INC</BusinessNameLine1>
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          <BusinessNameLine1>ELITE IRONWORKS</BusinessNameLine1>
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          <BusinessNameLine1>EM III ARCHITECTURAL</BusinessNameLine1>
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          <BusinessNameLine1>ENCLOS CORP</BusinessNameLine1>
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          <BusinessNameLine1>ESA STEEL INC</BusinessNameLine1>
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          <BusinessNameLine1>FACADE TEK</BusinessNameLine1>
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          <BusinessNameLine1>FEDERAL RENT-A-FENCE</BusinessNameLine1>
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          <BusinessNameLine1>FENCE FACTORY FAMILY INC</BusinessNameLine1>
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          <BusinessNameLine1>FLYNN FENCE AND SUPPLY CO</BusinessNameLine1>
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          <BusinessNameLine1>FOWLER FENCING CONTRACTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>GAMMA INSTALLATIONS</BusinessNameLine1>
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          <BusinessNameLine1>GASKILL &amp; WALTON CONSTRUCTION CO</BusinessNameLine1>
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          <BusinessNameLine1>GAUTHIER GLASS</BusinessNameLine1>
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          <BusinessNameLine1>GFS FENCE GUARDRAIL &amp; SIGNAGE</BusinessNameLine1>
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          <BusinessNameLine1>GLASS DESIGNERS INC</BusinessNameLine1>
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          <BusinessNameLine1>GMSGLASS MANAGEMENT SERVICES</BusinessNameLine1>
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          <BusinessNameLine1>GRAND STAGE CO</BusinessNameLine1>
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          <BusinessNameLine1>GRAYCOR INDUSTRIAL CONSTRUCTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>GREAT LAKES STEEL ERECTION INC</BusinessNameLine1>
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          <BusinessNameLine1>GUARDIAN CONSTRUCTION PRODUCTS INC</BusinessNameLine1>
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          <BusinessNameLine1>HANDRAIL DESIGN INC</BusinessNameLine1>
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          <BusinessNameLine1>HART ERECTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>HERITAGE STEEL CONSTRUCTION LLC</BusinessNameLine1>
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          <BusinessNameLine1>HORIZON ORNAMENTAL INC</BusinessNameLine1>
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          <BusinessNameLine1>HOSS STEEL SOLUTIONS</BusinessNameLine1>
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          <BusinessNameLine1>HOUSE OF DOORS INC</BusinessNameLine1>
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          <BusinessNameLine1>HUDSON WALLS LLC</BusinessNameLine1>
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          <BusinessNameLine1>ILLINOIS CONTRACT GLAZING INC</BusinessNameLine1>
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          <BusinessNameLine1>ILLINOIS SASH ERECTORS INC</BusinessNameLine1>
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          <BusinessNameLine1>IN-LINE FENCE &amp; FABRICATING CO</BusinessNameLine1>
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          <BusinessNameLine1>INDEPENDENT MECHANICAL INDUSTRIES INC</BusinessNameLine1>
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          <BusinessNameLine1>INDUSTRIAL DOOR CO OF CHICAGO</BusinessNameLine1>
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          <BusinessNameLine1>INDUSTRIAL FENCE INC</BusinessNameLine1>
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          <BusinessNameLine1>INDUSTRIAL MATERIAL SUPPLY</BusinessNameLine1>
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          <BusinessNameLine1>IWEISS INC</BusinessNameLine1>
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