In determining years of creditable service for annual leave accrual, an employee shall be entitled to receive service credit for the following:
An employee who is a retired member of a uniformed service as defined by 5 U.S.C. § 3501 shall be entitled to credit for active military service only if his or her retirement was based on one (1) of the two (2) following types of disabilities:
The determination of years of service may be made on the basis of an affidavit from the employee subject to verification by the personnel authority.
District government service prior to October 1, 1987, that is under Social Security shall be creditable for annual leave accrual purposes, and shall be purchasable for credit toward retirement under 5 U.S.C. § 8332.
Notwithstanding any other provision of this chapter, CSRS annuitants who are employed or re-employed by the District government after February 26, 2008, shall not receive service credit for any federal or District service that was used to compute their CSRS annuity.
D.C. Mun. Regs. tit. 6, r. 6-C1233