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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 2: Description of Business or Family Relationship of Officers, Directors, Et</FormAndLineReferenceDesc>
        <ExplanationTxt>Some of the Board members as well as the Executive Director are current or former employees of Crossroads School for the Arts &amp; Sciences.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 8: Explanation of No Contemporaneously Documentation of Meetings</FormAndLineReferenceDesc>
        <ExplanationTxt>There are no committees with the authority to act on behalf of the Board.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b: Form 990 Review Process</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 is prepared by an independent CPA who delivers a draft copy to the Executive Director. They review and discuss the forms. Any necessary revisions are made and a final copy is delivered to Executive Director who presents it to the President for signature and filing. A copy of the 990 is then made available to the entire Board of Directors prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c: Explanation of Monitoring and Enforcement of Conflicts</FormAndLineReferenceDesc>
        <ExplanationTxt>All board members annually sign a written conflict of interest statement that discloses any conflicts. To date no known conflicts have arisen.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15a: Compensation Review &amp; Approval Process - CEO, Top Management</FormAndLineReferenceDesc>
        <ExplanationTxt>The Executive Director's compensation is proposed by the Executive Committee, based on comparable Executive Director salaries in the Los Angeles area and years of experience, and voted on and approved by the full board. The Executive Committee proposes an annual 1.5 - 3% raise most years which is also voted on and approved by the full board.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19: Other Organization Documents Publicly Available</FormAndLineReferenceDesc>
        <ExplanationTxt>The following organizational documents of P.S. Science are available for inspection or copying at the organization's office during normal business hours at no charge, except for a nominal copying fee:1) Tax Exemption Application2) IRS Determination letter3) Articles of Incorporation4) By-Laws5) Form 990 for the most recent and prior two years. 6) Conflict of interest policy.7) Financial statements.The public inspection copy of the Form 990 will not include Schedule A excess contributors or the Schedule B.The most updated versions of all of the preceding forms will be available.When responding to a public inspection request for any organizational document or Form 990 by anyone, P.S. Science will fulfill such request in a timely fashion without inquiring as to the reason for the public inspection request.</ExplanationTxt>
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