Prohibition on civil action for certain border security measures

(a) In general The Attorney General may not bring or maintain a civil action (including an action that is pending on the date of enactment of this Act) under section 9 or 10 of the Act of March 3, 1899 (33 U.S.C. 401; 403), against a State for any measure undertaken by the State to build, construct, erect, or otherwise install a barrier along the international border of the State for the purpose of— (1) preventing aliens from entering the State in violation of the immigration laws; or (2) protecting the territory of the State. (b) Definitions In this section: (1) Alien The term alien has the meaning given such term in section 101 of the Immigration and Nationality Act (8 U.S.C. 1101). (2) Barrier The term barrier means any physical structure intended to secure the border, including a wall, fence, or floating buoy. (3) Immigration laws The term immigration laws has the meaning given such term in section 101 of the Immigration and Nationality Act (8 U.S.C. 1101).