Notwithstanding subsections (a), (b), and (c) and except as provided in subsections (e) and (f), an individual divorced on or before December 4, 1991, from a participant or retired participant in the Central Intelligence Agency Retirement and Disability System or Federal Employees’ Retirement System Special Category who enrolled in a health benefits plan following the dissolution of the marriage to such participant may continue enrollment following the death of such participant notwithstanding the termination of the retirement annuity of such individual.