Unless specifically provided in this title, the Office shall determine the content, size, form, and place where signs are to be displayed in or on taxicabs.
No signs or other matter shall be affixed to any taxicab except as may be authorized by the Office. This section shall in no way affect any sign, sticker, or the like required by other public authority.
This section shall not apply to exterior rooftop advertising signs displayed on taxicabs pursuant to the Taxicab Commercial Advertising Amendment Act of 1992.
D.C. Mun. Regs. tit. 31, r. 31-810