D.C. Code § 6-641.15: Federal public buildings excepted from this subchapter.

The provisions of this subchapter shall not apply to federal public buildings; provided, however, that, in order to ensure the orderly development of the national capital, the location, height, bulk, number of stories, and size of federal public buildings in the District of Columbia and the provision for open space in and around the same will be subject to the approval of the National Capital Planning Commission.