This document amends the Customs Regulations, on an interim basis, in order to implement a provision of the Aviation and Transportation Security Act which requires that air carriers make Passenger Name Record (PNR) information available to Customs upon request. The availability of PNR information to Customs is necessary for purposes of ensuring aviation safety and protecting national security. Under the interim rule, each air carrier must provide Customs with electronic access to requested PNR information contained in the carrier's automated reservation system and/or departure control system that sets forth the identity and travel plans of any passenger(s) on flights in foreign air transportation either to or from the United States. In order to readily provide Customs with such access to requested PNR data, each air carrier must ensure that its electronic reservation/departure control systems correctly interface with the U.S. Customs Data Center, Customs Headquarters. Any air carrier which has not yet taken steps to properly interface its automated PNR database with the Customs Data Center must do so within 30 days from the date that Customs contacts the carrier and requests that the carrier effect such an interface. However, the Assistant Commissioner, Office of Field Operations (OFO), may allow an air carrier an additional extension of this period for good cause shown.