2 U.S.C. § 1811: Powers and duties

The Architect of the Capitol shall perform all the duties relative to the Capitol Building performed prior to August 15, 1876 , by the Commissioner of Public Buildings and Grounds: Provided , That no change in the architectural features of the Capitol Building or in the landscape features of the Capitol Grounds shall be made except on plans to be approved by Congress. To the extent that the Director of the National Park Service has jurisdiction and control over any portion of the area described in subsection (b) and any monument or other facility which is located within such area, such jurisdiction and control is hereby transferred to the Architect of the Capitol as of the date of the enactment of this Act [ Dec. 23, 2011 ]. The area described in this subsection is the property which is bounded on the north by Pennsylvania Avenue Northwest, on the east by First Street Northwest and First Street Southwest, on the south by Maryland Avenue Southwest, and on the west by Third Street Southwest and Third Street Northwest.”