The annuity of a former spouse under this subsection commences on the day the participant upon whose service the annuity is based becomes entitled to an annuity under this subchapter or on the first day of the month after the divorce or annulment involved becomes final, whichever is later.
If an annuitant whose annuity is reduced under subparagraph (A) is recalled to service under section 2111 of this title, or reinstated or reappointed, in the case of a recovered disability annuitant, or if any annuitant is reemployed as provided for under sections 2112 and 2113 of this title, the pay of that annuitant shall be reduced by the same amount as the annuity would have been reduced if it had continued. Amounts equal to the reductions under this subparagraph shall be deposited in the Treasury of the United States to the credit of the fund.
A former spouse of a participant, former participant, or retired participant shall not become entitled under this subsection to an annuity payable from the fund unless the former spouse elects to receive it instead of any survivor annuity to which the former spouse may be entitled under this or any other retirement system for Government employees on the basis of a marriage to someone other than the participant.
An annuity payable from the fund under this subchapter to a surviving former spouse under this subsection shall commence on the day after the annuitant dies and shall terminate on the last day of the month before the former spouse’s death or remarriage before attaining age 55. If such a survivor annuity is terminated because of remarriage, it shall be restored at the same rate commencing on the date such remarriage is dissolved by death, annulment, or divorce if any lump sum paid upon termination of the annuity is returned to the fund.
Once a survivor annuity has been provided under this subsection for any former spouse, a survivor annuity for another individual may thereafter be provided under this subsection (or section 2031(b)(3) of this title) with respect to the participant only for that portion (if any) of the maximum available which is not committed for survivor benefits for any former spouse whose prospective right to such annuity has not terminated by reason of death or remarriage.
If a former spouse of a retired participant dies or remarries before attaining age 55, the annuity of the retired participant, if reduced to provide a survivor annuity for that former spouse, shall be recomputed and paid, effective on the first day of the month beginning after such death or remarriage, as if the annuity had not been so reduced, unless an election is in effect under subparagraph (B).
Neither the total amount of survivor annuity or annuities under this subsection with respect to any participant, nor the survivor annuity or annuities for any one surviving spouse or former spouse of such participant under this section or section 2031 of this title, may exceed 55 percent of the unreduced amount of the participant’s annuity, as computed under section 2031(a) of this title.
The present value of the total amount to accrue to the fund under subparagraph (A) to provide any annuity under this subsection shall be actuarially equivalent in value to such annuity, as calculated upon such tables of mortality as may from time to time be prescribed for this purpose by the Director.
Under regulations prescribed by the Director, an annuity shall be recomputed (or a pay allotment terminated or adjusted), and a refund provided (if appropriate), in a manner comparable to that provided under subparagraph (C), in order to reflect a termination or reduction of future benefits under this subsection for a spouse in the event a former spouse of the participant dies or remarries before attaining age 55 and an increased annuity is provided for that spouse in accordance with this section.