D.C. Mun. Regs. tit. 24, § 701
701.1 Persons wishing to obtain a permit for a mobile sound unit shall submit an application in writing, or in person, to the Chief of Police.
701.2 Application for a mobile sound unit permit shall be made two (2) weeks before the permit is to be used.
701.3 The applicant shall supply the following information:
(a) The applicant's full name, address, and phone number;
(b) The name of the organization requesting the permit (if any), and the applicant's official position in the organization;
(c) The purpose for the sound unit; and
(d) The license number and description of the vehicle to be used.
701.4 Permits shall be issued only for sound units operating for a community, civic, or electoral purpose.
701.5 Permits shall not be issued for commercial advertising purposes.
701.6 All sound units are subject to applicable District laws and regulations governing noise control.
SOURCE: 35 DCRR § 106, Special Edition (November 1980).