D.C. Mun. Regs. tit. 17, § 6401
6401.1 Subject to § 6401.2, a license issued pursuant to this chapter shall expire at 12:00 midnight of March 31 of each even-numbered year.
6401.2 If the Director changes the renewal system pursuant to § 4006.3 of chapter 40 of this title, a license issued pursuant to this chapter shall expire at 12:00 midnight of the last day of the month of the birthdate of the holder of the license, or other date established by the Director.
SOURCE: Final Rulemaking published at 35 DCR 4494 (June 17, 1988).