; (2) in subparagraph (E)(iv), by striking the period at the end and inserting ; and ; and (3) adding at the end the following: (F) standard operating procedures regarding the detection, interdiction, inspection, processing, or transferring of alien children that officers and agents of U.S. Customs and Border Protection shall employ in the execution of their duties. . (b) Facilities standards (1) Initial review and update Not later than 270 days after the date of the enactment of this Act, the Secretary of Homeland Security shall review and update the regulations under part 115 of title 6, Code of Federal Regulations, which set standards to prevent, detect, and respond to sexual abuse and assault in immigration detention facilities and other holding facilities under the jurisdiction of the Department of Homeland Security. (2) Quadrennial review The Secretary of Homeland Security shall review and update the regulations referred to in paragraph (1) not less frequently than once every 4 years. 13. Regional processing centers Subtitle C of title IV of the Homeland Security Act of 2002 ( 6 U.S.C. 231 et seq.) is amended by adding at the end the following: 437. Regional processing centers (a) In general The Secretary shall establish at least 4 regional processing centers located in high traffic sectors of U.S. Border Patrol, as determined by the Secretary, along the southern border land border of the United States. All family units apprehended by U.S. Customs and Border Protection in such sectors shall be expeditiously transported to the nearest regional processing center. (b) Purpose The regional processing centers established pursuant to subsection (a) shall carry out family unit processing activities, including— (1) criminal history checks; (2) identity verification; (3) DNA analysis; (4) medical screenings; (5) asylum interviews and credible fear determinations under section 235 of the Immigration and Nationality Act ( 8 U.S.C. 1225 )