D.C. Mun. Regs. tit. 10, r. 10-C3202
The Board shall maintain a general public mailing list for notice of public meetings, .hearings, and other matters. The mailing list shall include the members of the Council of the District of Columbia, all Advisory Neighborhood Commissions, and any historic preservation organization, civic group, or interested person upon request.
At least every two years, the HPO may purge the mailing list of organizations and persons listed by request, after giving notice indicating the manner in which they should state their desire to remain on the list. The HPO may also routinely purge the mailing list of any addressees upon receipt of mail returned by the U.S. Postal Service as undeliverable. Anyone purged from the list may request reinstatement at any time.
The Board may supplement the general public mailing list with an electronic mailing list maintained for the same purposes.
D.C. Mun. Regs. tit. 10, r. 10-C3202