D.C. Code § 47-138
No funds appropriated for the government of the District of Columbia may be used to furnish materials or services to promote or further any demonstration in the District of Columbia undertaken for the purpose of influencing legislation or other governmental actions of the United States government or the government of the District of Columbia, except that nothing in this section shall preclude the government of the District of Columbia from taking such emergency action as the Mayor of the District of Columbia determines necessary for the preservation of the health, safety, or welfare of any person within the District of Columbia.
D.C. Code § 47-138
No appropriations to be used for publicity, propaganda or lobbying: Section 116 of Pub. L. 101-168, the District of Columbia Appropriations Act, 1990, provided that no part of this appropriation shall be used for publicity or propaganda purposes or implementation of any policy including boycott designed to support or defeat legislation pending before Congress or any state legislature.