; and (B) in paragraph (1)(F)(i), by striking (as defined in paragraph (5)) and inserting (as defined in paragraph (4)) ; and (2) in subsection (f)— (A) by redesignating paragraphs (5) through (8) as paragraphs (4) through (7); and (B) in paragraph (1)(F)(i), by striking (as defined in paragraph (5)) and inserting (as defined in paragraph (4)) . (d) Effective date The amendments made by this section shall take effect on January 1, 2020, and shall apply to determinations of eligibility for, and the amount of, widow's and widower's insurance benefits payable on or after such date. 3. Increase in child's age limit for child-in-care benefits (a) In general Section 202(s)(1) of the Social Security Act ( 42 U.S.C. 402(s)(1) ) is amended by striking age of 16 and inserting age of 18 (or, in the case of a child who is a full-time elementary or secondary school student, 19) . (b) Effective date The amendment made by this section shall take effect on January 1, 2020, and shall apply to determinations of eligibility for, and the amount of, benefits payable on or after such date. 4. Modification of benefit limit for widows, widowers, and surviving divorced spouses; increase in benefit amount for delay in claiming benefits (a) In general Section 202 of the Social Security Act ( 42 U.S.C. 402 ), as amended by section 2, is further amended— (1) in subsection (e)(2)— (A) in subparagraph (A), by inserting subsection (aa), subsection (bb) after subsection (q),