((a)) ** Officers and employees to whom section 2051 rules apply** Notwithstanding any other provision of law, an officer or employee of the Central Intelligence Agency subject to retirement system coverage under subchapter III of chapter 83 of title 5 who—
((1)) has five years of civilian service credit toward retirement under such subchapter III of chapter 83, title 5;
((2)) has not been designated under as a participant in the Central Intelligence Agency Retirement and Disability System;
((3)) has become disabled during a period of assignment to the performance of duties that are qualifying toward such designation under such ; and
((4)) satisfies the requirements for disability retirement under —
((b)) ** Survivors of officers and employees to whom section 2052 rules apply** Notwithstanding any other provision of law, in the case of an officer or employee of the Central Intelligence Agency subject to retirement system coverage under subchapter III of chapter 83, title 5, who—
((1)) has at least eighteen months of civilian service credit toward retirement under such subchapter III of chapter 83, title 5;
((2)) has not been designated under , as a participant in the Central Intelligence Agency Retirement and Disability System;
((3)) prior to separation or retirement from the Agency, dies during a period of assignment to the performance of duties that are qualifying toward such designation under such ; and
((4)) is survived by a surviving spouse, former spouse, or child as defined in , who would otherwise be entitled to an annuity under —
((c)) ** Annuities under this section deemed annuities under chapter 83 of title 5** The annuities provided under subsections (a) and (b) of this section shall be deemed to be annuities under chapter 83 of title 5 for purposes of the other provisions of such chapter and other laws (including title 26) relating to such annuities, and shall be payable from the Central Intelligence Agency Retirement and Disability Fund maintained pursuant to .section 2012 of this title