To be eligible for retirement or survivor benefits under this part, a former spouse must—

(a) Have been a former spouse on February 14, 1981;

(b) After becoming a former spouse, not have remarried before attaining age 55;

(c) In the case of any retirement benefit under § 20.5; elect this benefit instead of any survivor annuity for which the former spouse may simultaneously be eligible under this or another retirement system for Government employees; and

(d) Submit an application to the Department of State by June 22, 1990, in accordance with § 20.9 unless that date is extended as authorized by that section. The deadline for submission of an application for survivor benefits under § 20.5 will be deemed to have been met if the former spouse submits an application for retirement benefits within the deadline.