D.C. Mun. Regs. tit. 24, r. 24-2000
For purposes of this section, the term "public space" includes any street, avenue, alley, highway, footway, sidewalk, parking, or other public space in the District of Columbia.
No person shall deposit, place, or leave in or upon any public space any glass, crockery, nails, tin, iron cuttings, hoops, wagon tires, wire, or any other article or thing liable to wound or injure a person or an animal, or to cause damage to personal property.
Personal property placed on public space under a permit in accordance with the provisions of chapter 2, and maintained as required by chapter 2, shall be exempt from the provisions of § 2000.2.
No person shall place, leave, or cause to be placed or left on any public space any deposit dangerous to life and limb, without first obtaining a permit from the District.
No person shall occupy with, place, or leave, or cause to be placed or left on public space, any wet paint or other slippery or sticky substance, or any deposit dangerous to life and limb, without protecting and guarding that public space.
The protection of public space required under § 2000.5 shall include the following:
When the space occupied under § 2000.5 extends a distance of five feet (5 ft.) or more, at least one (1) light shall be exhibited at each end of the wet paint or other slippery or sticky substance or deposit. The light shall be hung so that it is clearly visible for a distance of at least one hundred feet (100 ft.) in any direction.
Whenever any permit issued by the District for the performance of work in either public or private space also includes permission to occupy public space, that permit shall be in lieu of the permit required by this section.
D.C. Mun. Regs. tit. 24, r. 24-2000