D.C. Mun. Regs. tit. 10-C, § 214
214.1 Each applicant for designation shall file with the Board, at least ten (10) days before the hearing, a list of persons who will speak on the applicant's behalf.
214.2 Each owner of property proposed for historic landmark designation (if not the applicant), shall file with the Board at least seven (7) days before the hearing a list of persons who will speak on the owner's behalf.
SOURCE: Notice of Final Rulemaking published at 51 DCR 7447 (July 30, 2004).