D.C. Mun. Regs. tit. 18, r. 18-4000
Pursuant to the authority set forth in this title, the Director has established specific designations, requirements, and restrictions which apply to particular locations.
With respect to all sections of this chapter, the specific locations at which each particular designation, requirement, or restriction applies are incorporated by reference, in accordance with the provisions of the District of Columbia Documents Act.
The complete listing of specific locations for each designation, requirement, or restriction set forth in this chapter, or any section thereof, may be reviewed at the offices of the Department of Public Works, and copies may be obtained, upon request, from the Director upon payment of a reasonable copying fee to be determined by the Director.
Where a large number of specific locations are listed in a particular section of this chapter, the Director may, in his or her discretion, compile and make available such listings by quadrant. In such cases, the listings shall be compiled for each of the following quadrants:
Amendments to the listing of specific locations for each designation, requirement, or restriction will be made in accordance with the provisions of the District of Columbia Administrative Procedure Act (D.C. Code § 1-1501 et seq.).
Unless otherwise indicated in a particular section of this chapter, the location where a specific traffic designation, requirement, or restriction is in effect shall be marked by the posting of a sign, traffic device, barricade, street marking, or other indication of the traffic regulation in effect.
No traffic designation, requirement, or restriction shall be in effect at a particular location unless the proper official sign giving notice of the traffic regulation has been posted and is in place at that location.
Unless otherwise indicated, where a particular traffic designation, requirement, or restriction is in effect only during specific hours of the day, that designation, requirement, or restriction shall not be in effect on Saturdays or Sundays.
As used in this section, the term "Federal Holidays" shall mean those days which are not General Holidays and which have been declared by the President of the United States to be holidays for Federal government employees in the Washington, D.C. Metropolitan Area. These Federal Holidays shall be as follows:
As used in this section, the term "District Holidays" shall mean those days which are not General or Federal Holidays and which have been declared by the Mayor of the District of Columbia to be holidays for District of Columbia Government employees. This District Holiday is Dr. Martin Luther King, Jr.'s Birthday. On District Holidays, regulations on parking meter payments, parking meter time limits, and time limits on Residential Permit Parking areas shall not be in effect or applicable.
D.C. Mun. Regs. tit. 18, r. 18-4000