Upon approval of an application for a reserved space, the Director shall assign a space number and cause the posting of signs which shall denote the space. The sign shall contain the universal symbol of accessibility and the language, "Reserved, Parking by Special Permit No._, Only." A reserved space shall not exceed twenty feet (22 ft.) in length.
D.C. Mun. Regs. tit. 18, r. 18-2714