D.C. Mun. Regs. tit. 22, r. 22-A3817
Any formal notice issued by the Director, including any notice or order to deny, suspend, convert, deny renewal of or to revoke a license, and any notice of appeal rights or notice of a hearing shall be served:
If notice is served personally, it shall be effective when delivery is made personally to the MHCRF or its authorized agent.
Each MHCRF granted a license shall provide a valid electronic mail address and consent to receive official correspondence, including licensing notices and infractions, at the electronic mail address.
A MHCRF that fails to respond to or appeal any notice within the allotted time waives any right to appeal or contest the notice. If a MHCRF that has been served does not appear for a scheduled hearing and no continuance has been granted, the Administrative Law Judge or Hearing Officer may proceed to hear evidence, consider the matter, and render a decision on the basis of the evidence available.
D.C. Mun. Regs. tit. 22, r. 22-A3817