not more than 2 years, or both . 624. Authority of United States Capitol Police to enforce citations (a) Authority Section 9B(a) of the Act entitled An Act to define the area of the United States Capitol Grounds, to regulate the use thereof, and for other purposes , approved July 31, 1946 ( 2 U.S.C. 1967(a) ), is amended— (1) by striking and at the end of paragraph (4)