; and (3) use data from more than one year, where possible, to analyze how much family size changes over time. (c) Definition The term the income-driven repayment plan means a plan described in subparagraph (D) or (E) of section 455(d)(1) of the Higher Education Act of 1965 ( 20 U.S.C. 1087e(d)(1) ) and the income-based repayment plan under section 493C(f) of such Act ( 20 U.S.C. 1098e(f) ), as added by section 4627 of this Act. 9005. Universal unique numeric data identifier (a) Assignment of unique numeric identifier required Not later than 18 months after the date of the enactment of this Act, the Secretary of Education shall assign a unique numeric identifier to at least each campus of each institution of higher education that participates in a program under title IV of the Higher Education Act of 1965 ( 20 U.S.C. 1070 et seq.) to be used for reporting and disaggregating data for the purposes of the following: (1) Surveys conducted as a part of the Integrated Postsecondary Education Data System (IPEDS) or any other Federal postsecondary institution data collection effort, as completed in accordance with section 487(a)(17) of the Higher Education Act of 1965 ( 20 U.S.C. 1094(a)(17) ). (2) Reports required to be filed under section 485(f) of the Higher Education Act of 1965 ( 20 U.S.C. 1092(f) ). (3) The electronic exchange of data under section 485B of the Higher Education Act of 1965 ( 20 U.S.C. 1092b ). (4) Determinations under section 496 of the Higher Education Act of 1965 ( 20 U.S.C. 1099b ). (5) Reports filed on the College Scorecard website of the Department of Education (or any successor website). (6) Reports filed on the College Navigator website (as defined in section 132 of the Higher Education Act of 1965 ( 20 U.S.C. 1015a )). (7) Data submitted to the postsecondary student data system established under section 132(l) of the Higher Education Act of 1965 ( 20 U.S.C. 1015a(l) ), as added by this Act. (8) To the extent determined to be appropriate by the Secretary, any other data systems of the