5 CFR 831.643: Time for filing applications for death benefits.

(a) A survivor of a deceased employee, Member, or retiree, may file an application for annuity, personally or through a representative, at any time within 30 years after the death of the employee, Member, or retiree.

(b) A former spouse claiming eligibility for an annuity based on § 831.683 may file an application at any time between November 8, 1984 and May 7, 1989. Within this period, the date that the first correspondence indicating a desire to file a claim is received by OPM will be treated as the application date for meeting timeliness deadlines and determining the commencing date of the survivor annuity under § 831.683 if the former spouse is eligible on that date.