; (B) in paragraphs (1)(B), (1)(F)(ii), (1)(G)(iii), (6)(A), (6)(D), (6)(E)(ii), and (7)(D), by striking 19 each place it appears and inserting 23 ; (C) in subparagraphs (A), (B), and (D) of paragraph (7), by striking elementary or secondary school each place it appears and inserting educational institution ; (D) in paragraph (7)(A), by striking schools involved and inserting institutions involved ; (E) in paragraph (7), by amending subparagraph (C) to read as follows: (C) For purposes of this subsection, the term educational institution means— (i) a school which provides elementary or secondary education as determined under the law of the State or other jurisdiction in which it is located; and (ii) an institution described in section 102 of the Higher Education Act of 1965 ( 20 U.S.C. 1002 ). ; and (F) in paragraph (7)(D), by striking diploma or equivalent certificate from a secondary school (as defined in subparagraph (C)(i)) and inserting diploma, degree, or equivalent certificate from an institution described in subparagraph (C)(ii) . (2) Effective date The amendments made by this subsection shall apply to child's insurance benefits that are payable for months beginning after December 31, 2018. (b) Temporary exclusion from determination of maximum family benefits Section 203(a) of the Social Security Act ( 42 U.S.C. 403(a) ) is amended— (1) in paragraph (3)— (A) by redesignating subparagraph (D) as subparagraph (E)