D.C. Mun. Regs. tit. 10, r. 10-C215
The applicant for a proposed historic landmark or historic district designation may request postponement of the hearing by submitting a written request to the Board at least 48 hours before a scheduled hearing. The owner of a proposed historic landmark may request postponement of the designation hearing in the same manner.
Any request for postponement shall indicate which scheduled Board meeting is requested for a hearing date. Any request for postponement shall be accompanied by the owner's written agreement not to object to the timeliness of the Board's action due to this postponement.
The Chairperson of the Board may accept or deny a request for postponement as deemed appropriate. If there is a postponement, the Board may provide a new hearing notice as provided in this chapter, or may give notice of the postponement at the time and place originally scheduled for the hearing, in which case no further notice of the postponement is required.
D.C. Mun. Regs. tit. 10, r. 10-C215