; and (B) acts and conditions occurring or existing before, on, or after the date of the enactment of this Act. (2) Amendments made by subsection (c) The amendments made by subsection (c) shall take effect upon the date of the enactment of this Act. Sections 235 and 236 of the Immigration and Nationality Act, as amended by subsection (c), shall apply to any alien in detention under provisions of such sections on or after the date of the enactment of this Act. 1505. GAO study on deaths in custody Not later than 1 year after the date of the enactment of this Act, the Comptroller General of the United States shall submit a report to Congress on the deaths in custody of detainees held by the Department of Homeland Security, which shall include, with respect to any such deaths— (1) whether any such deaths could have been prevented by the delivery of medical treatment administered while the detainee is in the custody of the Department of Homeland Security; (2) whether Department practices and procedures were properly followed and obeyed; (3) whether such practices and procedures are sufficient to protect the health and safety of such detainees; and (4) whether reports of such deaths were made to the Deaths in Custody Reporting Program. 1506. GAO study on migrant deaths Not later than 1 year after the date of the enactment of this Act, the Comptroller General of the United States shall submit, to the Committee on the Judiciary of the Senate , the Committee on Homeland Security and Governmental Affairs of the Senate , the Committee on the Judiciary of the House of Representatives , and the Committee on Homeland Security of the House of Representatives , a report that describes— (1) the total number of migrant deaths along the southern border during the previous 7 years; (2) the total number of unidentified deceased migrants found along the southern border in the previous 7 years