D.C. Mun. Regs. tit. 6, r. 6-B1241
A full-time employee to whom this chapter applies shall accrue sick leave on the basis of four (4) hours for each full biweekly pay period.
Sick leave shall be credited at the beginning of each full or partial (one-half (1/2)) pay period for use during or after that pay period.
Except as provided in section 1241.5 of this section, a part-time employee shall earn one (1) hour of sick leave for each twenty (20) hours in a pay status.
Sick leave provided for in this section that is not used by an employee during the year in which it accrues shall accumulate and be available for use in succeeding years. There shall be no limitation on the amount of sick leave an employee may accumulate.
A part-time employee entitled to earn sick leave as provided in section 1241.3 of this section shall not earn sick leave for any hours worked for which he or she is entitled to overtime compensation under Chapter 11 of these regulations.
D.C. Mun. Regs. tit. 6, r. 6-B1241