policy and a practice to, assist in the enforcement of the immigration laws of the United States in the course of carrying out the routine law enforcement duties of such State or political subdivision of a State. Entities covered under this section may not have any policy or practice that prevents local law enforcement from inquiring about a suspect's immigration status. (c) Funding There are authorized to be appropriated to the Secretary for grants under this section such sums as may be necessary for fiscal year 2017 and each subsequent fiscal year. (d) GAO audit Not later than three years after the date of the enactment of this Act, the Comptroller General of the United States shall conduct an audit of funds distributed to States, and to political subdivisions of a State, under subsection (a). 7. Increased Federal detention space (a) Construction or acquisition of detention facilities (1) In general The Secretary of Homeland Security shall construct or acquire, in addition to existing facilities for the detention of aliens, 20 detention facilities in the United States, for aliens detained pending removal from the United States or a decision regarding such removal. Each facility shall have a number of beds necessary to effectuate the purposes of this Act. (2) Determinations The location of any detention facility built or acquired in accordance with this subsection shall be determined by the Deputy Assistant Director of the Detention Management Division of the Immigration and Customs Enforcement Office of Detention and Removal within United States Immigration and Customs Enforcement. (b) Authorization of appropriations There are authorized to be appropriated to the Secretary such sums as are necessary to carry out this section. (c) Technical and conforming amendment Section 241(g)(1) of the Immigration and Nationality Act ( 8 U.S.C. 1231(g)(1) ) is amended by striking may expend and inserting shall expend . 8. Federal custody of aliens unlawfully present in the United States apprehended by State or local law