D.C. Mun. Regs. tit. 24, r. 24-121
No person or persons shall set up, maintain, or establish any camp or any temporary place of abode in any tent, wagon, van, automobile, truck, or house trailer, of any description, or in any combination, on public or private property, without the consent of the Mayor of the District of Columbia.
Nothing contained in this section shall prevent any owner or lawful occupant of private property provided with sufficient sewage and water facilities, in the opinion of the Director of Health, from permitting use of the his or her private property for setting up and maintaining a temporary place of abode for not more than a total thirty (30) days in any consecutive three (3) months.
Each tent, wagon, van, automobile, truck, house trailer, or other temporary place of above shall be situated or placed more than forty feet (40 ft.) from any public space; and shall not disturb the peace and quiet of the neighborhood.
D.C. Mun. Regs. tit. 24, r. 24-121