Message Implementation Guideline for Airlines: UN/EDIFACT PAXLST/CUSRES Message Sets v 2.03 [open pdf - 834KB]
This document which was published by the U.S. Customs & Border Protection (CBP) Enforcement Systems Branch, "is based on the WCO/IATA/ICAO Advanced Passenger Information Guidelines, with Department of Homeland Security (DHS) additions, and contains the technical guidelines for carriers to follow in the preparation and transmission of the passenger/crew manifest data for processing by DHS. The Technical guidelines are based on the DHS Consolidated User Guide (CUG) for APIS Pre-Departure and Secure Flight. A standard data format known as UN/EDIFACT -- United Nations/Electronic Data Interchange for Administration, Commerce, and Trade -- was adopted by the United Nations Economic Commission for Europe (UN/ECE). A version of the UN/EDIFACT 'PAXLST' message set has been codified by the World Customs Organization (WCO) and the International Air Transport Association (IATA) for worldwide use by all scheduled air carriers and border control authorities. Additional PAXLST message segments, data elements, and code values have been defined by DHS as necessary to meet the requirements of U.S. regulations."
United States Customs and Border Protection: http://www.cbp.gov