§ 1541.
(f)
No pension shall be paid under this section to a surviving spouse of a veteran unless the spouse was married to the veteran—
(1)
before (A) December 14, 1944, in the case of a surviving spouse of a Mexican border period or World War I veteran, (B) January 1, 1957, in the case of a surviving spouse of a World War II veteran, (C) February 1, 1965, in the case of a surviving spouse of a Korean conflict veteran, (D) May 8, 1985, in the case of a surviving spouse of a Vietnam era veteran, or (E) January 1, 2001, in the case of a surviving spouse of a veteran of the Persian Gulf War;
(2)
for one year or more; or
(3)
for any period of time if a child was born of the marriage, or was born to them before the marriage.
([Pub. L. 85–857], Sept. 2, 1958, [72 Stat. 1138], § 541; [Pub. L. 86–211, § 4], Aug. 29, 1959, [73 Stat. 434]; [Pub. L. 88–664, § 3(c)], (d), Oct. 13, 1964, [78 Stat. 1095]; [Pub. L. 90–77, title I], §§ 101(a), 106, title II, § 202(d)–(f), Aug. 31, 1967, [81 Stat. 178], 179, 182; [Pub. L. 90–275, § 1(c)], (d), Mar. 28, 1968, [82 Stat. 65], 66; [Pub. L. 91–588], §§ 1(c), (d), 9(d), Dec. 24, 1970, [84 Stat. 1581], 1584; [Pub. L. 92–198, § 1(c)]–(e), Dec. 15, 1971, [85 Stat. 663], 664; [Pub. L. 93–177, § 1(c)], (d), 2, Dec. 6, 1973, [87 Stat. 695]; [Pub. L. 93–527, § 3], Dec. 21, 1974, [88 Stat. 1703]; [Pub. L. 94–169, title I], §§ 101(2)(B), (C), (H), 103, 106(40), Dec. 23, 1975, [89 Stat. 1013], 1014, 1016, 1019; [Pub. L. 94–432, title II, § 203], Sept. 30, 1976, [90 Stat. 1370]; [Pub. L. 95–204, title I, § 102], Dec. 2, 1977, [91 Stat. 1456]; [Pub. L. 95–588, title I, § 109(a)], Nov. 4, 1978, [92 Stat. 2503]; [Pub. L. 102–25, title III, § 333(b)], Apr. 6, 1991,