D.C. Code § 10-503.23: Suspension of prohibitions against use — Authorization generally — Authorization of Capitol Police Board.

In the absence from Washington of either of the officers designated in § 10-503.22, the authority therein given to suspend certain prohibitions of this part shall devolve upon the other, and in the absence from Washington of both it shall devolve upon the Capitol Police Board; provided, that notwithstanding the provisions of §§ 10-503.17 and 10-503.22, the Capitol Police Board is hereby authorized to grant the Mayor of the District of Columbia authority to permit the use of Louisiana Avenue for any of the purposes prohibited by said § 10-503.17.