D.C. Mun. Regs. tit. 14, § 1302
1302.1 Each person licensed to conduct a hotel or motel shall at all times keep a register, which shall contain the following:
1302.2 Each room shall be numbered and the number of the room assigned to each occupant shall be indicated in the register.
1302.3 The register shall be available for inspection by officials of the District of Columbia.
SOURCE: The Housing Regulations of the District of Columbia, 5G DCRR § 7202, Commissioners' Order 53-1503 (August 11, 1955); as amended by Commissioners' Order 63-1354 (June 6, 1963), 9 DCR 276 (June 24, 1963).