D.C. Mun. Regs. tit. 17, § 5802
5802.1 Subject to § 5802.2, a certificate issued pursuant to this chapter shall expire at 12:00 midnight of June 30 of each even-numbered year.
5802.2 If the Director changes the renewal system pursuant to § 4006.3 of chapter 40 of this title, a certificate 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 certificate, or other date established by the Director.
SOURCE: Final Rulemaking published at 36 DCR 3497 (May 12, 1989).