; and (B) an applicable complaint mechanism to report any abuse, mistreatment, or misconduct. 405. Child welfare at the border (a) Guidelines Not later than 180 days after the date of enactment of this Act, the Secretary of Homeland Security, in consultation with the Secretary of Health and Human Services, experts in child development, child welfare, and pediatric medicine, and other relevant experts as appropriate, shall, by rule, develop and establish guidelines for the intake and treatment of children and families in the custody of the Commissioner of U.S. Customs and Border Protection. (b) Mandatory training The Secretary of Homeland Security shall— (1) require all U.S. Customs and Border Protection and subcontracted or cooperating entity personnel, who may have contact with a child at a port of entry or U.S. Border Patrol station to undergo appropriate training, which shall include in-person training, on— (A) the applicable legal authorities, policies, practices, and procedures relating to children in the custody of U.S. Customs and Border Protection; and (B) child development, trauma, and the manner in which trauma affects the health and behavior of children; and (2) require U.S. Customs and Border Protection personnel to annually undertake continuing training on— (A) identifying and responding to common signs and symptoms of medical distress in children; (B) best practices with respect to the guidelines developed in accordance with subsection (a)