Revision 3.18 of the Technical Import Guide is published CAU and the new revision 4.8 of the UCC Rules and Conditions for information exchange between Operators and Customs in the new UCC Import System (H1). This guide includes the messages from the external domain (communication between the Economic Operator and the Tax Agency) of the national component of the Automated Import Declaration System (H1), as well as any adaptations that may be necessary to improve the National Transit Systems in line with the Union Customs Code (UCC).

These rules and conditions for import declarations will be available and mandatory in the production environment from the date the agreement enters into force. 

Regarding the Cau 4.1 Information Reference Guide, the name of the label "DateAndTimeOfPaymentStatus" has been changed to the new name "DateOfPaymentStatus", and the data type has also been changed from a DateTime type to a Date type.

And finally, the version of the Supplementary Import Information CAU RREE V1.4 has not changed at all, it has only been updated due to a change in format.