D.C. Mun. Regs. tit. 24, r. 24-104
Without the written authority of the Mayor, no person shall change the grade of any parking; pave or cover any portion of a parking; or construct any walls, steps, coping, fences, or other structures on a parking.
Each day that the grade, paving, or covering of a parking remains changed; and each day that any walls, steps, coping, fences, or other structures remain on a parking; shall constitute a separate offense.
Nothing in this section shall be construed to prevent the person having control of the premises abutting on a public parking from sodding or beautifying it with flowers.
Parking division fences on streets and avenues shall follow property lines.
Parking leads shall not be over six feet (6 ft.) wide, without the approval of the Mayor.
Except in the case of building operations, permits to cross sidewalks shall be granted by the Mayor upon the application of the owner of the abutting property, or his or her authorized representative, under conditions similar to those named in the Building Code governing occupation or use of public space to guarantee against any injury to the sidewalk, paving, or curbing.
Permits to pave the public parking in districts zoned for first commercial, second commercial, and industrial uses shall be granted by the Director of Consumer and Regulatory Affairs upon the recommendation of the Director of the Department of Public Works; and upon payment of a fee of thirty-six dollars ($ 36) for each permit.
Without a permit from the Mayor, no person shall pave or cover with any permanent covering any sidewalk space or any portion of a sidewalk space.
Without a permit from the Mayor, no person shall place any letters or advertising device in or upon any sidewalk, in any manner whatever; either by projecting images or shadows upon the sidewalk by means of lenses or reflectors, or both, or in any other manner.
D.C. Mun. Regs. tit. 24, r. 24-104