• To : Automated Broker Interface, ACE Portal Accounts, New ACE Programming, Partner Government Agencies, EDI
Subject: Updated ACE CATAIR Documentation Posted to CBP.gov
U.S. Customs and Border Protection (CBP) has updated an Automated Commercial Environment (ACE) 
CBP and Trade Automated Interface Requirements (CATAIR) chapter and an appendix posted on CBP.gov. The updated ACE CATAIR documentation includes:

• PGA Message Set   
  - In PG01, added a disclaimer code 'E' for the US Fish and Wildlife Service
  - References to Appendix C in the PGA Message Set document, have been removed. (This occurred in Unit of Measure data elements in PG04, PG26, PG29, and PG31.)
  - Descriptions for the "Unit of Measure" data elements have been made generic.
  - Please refer to PGA IGs for specific UOM guidance.
  https://www.cbp.gov/document/guidance/pga-message-set

• ACE Appendix B 
  - HTS (tariff) Units of Measure that were listed in ACE Appendix C are now included as part of ACE Appendix B. (Appendix C document still exists in case it is referenced by other parts of ACE.) 
  - Shipping/Packaging Unit Codes and HTS (Tariff) Unit of Measure codes have been combined in Appendix B and are now called 'Units of Measure Codes' in Appendix B.
  https://www.cbp.gov/document/guidance/appendix-b-valid-codes-0

To download a copy of the updated ACE CATAIR documentation, please visit the “ACE Automated Broker Interface (ABI) CATAIR” page of CBP.gov/ACE. You may also copy and paste the URLs above to your internet browser.