D.C. Mun. Regs. tit. 9, § 2010
2010.1 Each notice of a hearing shall state the date, time, and place of the hearing.
2010.2 Each notice shall be sent from the Board or Panel by first class mail or hand-delivery to the address on the petition and to the Deputy Chief Financial Officer of the Office of Tax and Revenue, 441 Fourth Street, N.W., Room 450, Washington, D.C. 20001.
2010.3 Except as provided in § 2010.4, notice of the hearing date shall be sent not less than ten (10) days before the date set for the hearing.
2010.4 If the limitations on the time for the Board or Panel to conduct hearings does not permit the ten-day advance notification provided in § 2010.3, then the petitioner and Deputy Chief Financial Officer may be notified by telephone or by personal service. Under these circumstances a memorandum shall be placed in the file for the petition in question stating the method of notification and to whom and by whom the notification was given.
SOURCE: Final Rulemaking published at 45 DCR 24, 32 (January 2, 1998).