U.S. Customs and Border Protection (CBP) regulations require commercial air carriers to electronically transmit passenger information to CBP’s Advance Passenger Information System (APIS) prior to an aircraft’s arrival in or departure from the United States.  CBP proposes to amend these regulations to incorporate additional carrier requirements that will enable CBP to validate each passenger’s travel documents prior to the passenger boarding the aircraft.  This proposed rule would also require air carriers to transmit additional data elements through APIS for all commercial aircraft passengers arriving in the United States in order to support border operations and national security.  The collection of additional data elements will support the efforts of the Centers for Disease Control, within the Department of Health and Human Services, to monitor and contract-trace health incidents.