22 CFR § 19.11-3 - Regular survivor annuity for a spouse.
(a) In the absence of a joint election or a spousal agreement to the contrary, a participant or former participant who is separated from active service on or after February 15, 1981 who is married at the commencement of his/her annuity shall provide a regular survivor annuity for a spouse under § 19.10-2 equal to the maximum amount that remains available under limitations stated in paragraph (b) of that section after allowing for any commitment of a regular survivor annuity for a former spouse who has not remarried prior to age 60 and who is alive on the date the former participant becomes eligible for an annuity.
(b) A regular survivor annuity is also payable to a surviving spouse for whom a principal elected an annuity under § 19.10-3, § 19.10-4, or § 19.11-2(c) following a marriage after comencement of his/her annuity.
(c) The amount of a regular survivor annuity equals 55 percent of the base designated for the benefit at the time the principal's annuity commenced, adjusted by the total percentage of cost-of-living increases the principal was receiving at death.
(d) A survivor annuity is payable to a surviving spouse only if that person was married to the principal at the time of his/her death or if the spouse became a former spouse under the definition in § 19.2(k).