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 Sec. 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 Sec. 20.9 unless that date is extended as authorized by that section. The deadline for submission of an application for survivor benefits under Sec. 20.5 will be deemed to have been met if the former spouse submits an application for retirement benefits within the deadline.