1988—Subsec. (c)(1). Pub. L. 100–238 amended par. (1) generally. Prior to amendment, par. (1) read as follows: “The first increase (if any) made under this section to an annuity which is payable from the Fund under this part to a participant or to the surviving spouse of a deceased participant who dies in service shall be equal to the product (adjusted to the nearest ⅒ of 1 percent) of—

“(a) ⅙ of the applicable percent change determined under subsection (b) of this section, multiplied by

“(b) the number of full months for which the annuity was payable from the Fund under this part before the effective date of the increase (counting any portion of a month as a full month).

In the administration of this paragraph, the number of days of unused sick leave to the credit of a participant or deceased participant on the effective date of the then last preceding general annuity increase under this section shall be deemed to be equal to the number of days of unused sick leave to his or her credit on the day of separation from the Service.”

1986—Subsecs. (a), (c). Pub. L. 99–335 inserted “under this part” after “payable from the Fund” wherever appearing.

1983—Subsec. (e). Ex. Ord. No. 12446, § 2(a), substituted “rounded to the next lowest” for “fixed at the nearest”.

Subsec. (g). Ex. Ord. No. 12446, § 6(a), added subsec. (g).

1981—Subsec. (c)(1). Ex. Ord. No. 12289 amended first sentence of par. (1) generally. Prior to amendment, first sentence read as follows: “An annuity (except a deferred annuity) payable from the Fund to a participant who retires and receives an immediate annuity, or to a surviving spouse or former spouse of a deceased participant who dies in service or who dies after being separated with benefits under section 4009(b)(2) of this title, which has a commencing date after the effective date of the then last preceding general annuity increase under this section shall not be less than the annuity which would have been payable if the commencing date of such annuity had been the effective date of such last preceding increase.”

Amendment by Pub. L. 100–238 effective 90 days after Jan. 8, 1988, see section 261(a) of Pub. L. 100–238, set out as a note under section 4054 of this title.

Amendment by Pub. L. 99–335 effective Jan. 1, 1987, see section 702(a) of Pub. L. 99–335, set out as an Effective Date note under section 8401 of Title 5, Government Organization and Employees.

Amendment by section 2(a) Ex. Ord. No. 12446 effective with respect to any adjustment or redetermination of any annuity made on or after Oct. 17, 1983, see section 2(b) of Ex. Ord. No. 12446, set out under section 4067 of this title.

Amendment by section 6 of Ex. Ord. No. 12446 applicable to any adjustment occurring on or after Apr. 1, 1983 under this section to any annuity payable from the Foreign Service Retirement and Disability Fund, whether such annuity has a commencing date before, on, or after Oct. 17, 1983, but shall not cause any annuity to be reduced below the rate that is payable on Oct. 17, 1983, see section 6(b) of Ex. Ord. No. 12446, set out under section 4067 of this title.

Amendment by Ex. Ord. No. 12289 effective Feb. 15, 1981, see section 3 of Ex. Ord. No. 12289, set out under section 4067 of this title.

Any cost-of-living increase scheduled to take effect during fiscal year 1994, 1995, or 1996 under this section delayed until first day of third calendar month after date such increase would otherwise take effect, see section 11001 of Pub. L. 103–66, set out as a note under section 8340 of Title 5, Government Organization and Employees.