D.C. Mun. Regs. tit. 17, § 6002
6002.1 Subject to § 6002.2, a certificate issued to this chapter shall expire at 12:00 midnight of June 30 of even-numbered year.
6002.2 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 49 DCR 11771 (December 27, 2002).