D.C. Mun. Regs. tit. 17, § 1513
1513.1 Licenses are valid for two (2) years and expire on the 31st day of August of each even numbered year. The Board shall follow the following procedure when mailing renewal notices to licensees:
1513.2 If a holder of a license fails to renew the license within sixty (60) days after its expiration, the license shall be deemed to have lapsed on the date of expiration and the holder shall be required to apply for reinstatement of the expired license and pay the required reinstatement fee.
1513.3 The responsibility for the timely renewal of a licensee's license rests solely with the individual licensee.
SOURCE: Final Rulemaking published at 54 DCR 8783 (September 7, 2007).