§ 8340.
(f)
Effective September 1, 1966, or on the commencing date of annuity, whichever is later, the annuity of each surviving spouse whose entitlement to annuity payable from the Fund resulted from the death of—
(1)
an employee or Member before October 11, 1962; or
(2)
a retired employee or Member whose retirement was based on a separation from service before October 11, 1962;
is increased by 10 percent.
([Pub. L. 89–554], Sept. 6, 1966, [80 Stat. 576]; [Pub. L. 90–83, § 1(79)], Sept. 11, 1967, [81 Stat. 215]; [Pub. L. 91–93, title II, § 204], Oct. 20, 1969, [83 Stat. 139]; [Pub. L. 93–136, § 1], Oct. 24, 1973, [87 Stat. 490]; [Pub. L. 94–126, § 2(b)], Nov. 12, 1975, [89 Stat. 679]; [Pub. L. 94–183, § 2(35)], Dec. 31, 1975, [89 Stat. 1058]; [Pub. L. 94–440, title XIII, § 1306(a)], (c)(1), Oct. 1, 1976, [90 Stat. 1462]; [Pub. L. 95–454, title IX, § 906(a)(2)], (3), Oct. 13, 1978, [92 Stat. 1224]; [Pub. L. 96–499, title IV, § 401(a)], Dec. 5, 1980, [94 Stat. 2605]; [Pub. L. 97–35, title XVII, § 1702(a)], (b), Aug. 13, 1981, [95 Stat. 754]; [Pub. L. 97–253, title III], §§ 304(a), 309(a), Sept. 8, 1982, [96 Stat. 795], 798; [Pub. L. 98–270, title II, § 201(a)], Apr. 18, 1984, [98 Stat. 157]; [Pub. L. 98–369, div. B, title II, § 2201(b)], July 18, 1984, [98 Stat. 1058]; [Pub. L. 99–251, title II, § 204], Feb. 27, 1986, [100 Stat. 25].)