A participant who retires at least 90 days following July 1, 2002, who has then completed at least 23 years of credited service, and who is otherwise entitled to retire and receive a normal retirement benefit, shall have the opportunity to elect a Back Drop plan. A participant eligible for the Back Drop plan can elect in writing at his or her retirement to retroactively drop his or her credited service in excess of 20 years, for a period of months not exceeding 36 months immediately preceding the date of retirement (the "Back Drop period"); provided that the beginning of the Back Drop period may not extend past the earliest date on which the participant would have qualified for a normal retirement benefit. A participant who is not actively employed may not make a Back Drop election. To be effective, a Back Drop election by a married participant must be approved in writing by his or her spouse.
Ala. Code § 11-40-17.3 (1975)