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Update to AESTIR Appendix C, ISO Country Codes

1 September 2026

In plain English

CBP updated AESTIR Appendix C ISO Country Codes to reflect Nauru's constitutional renaming to the Republic of Naoero, with documentation posted on the AES webpage.

Read the official notice
Topic
Customs operations
Regulator
CBP
Published
1 September 2026
For
Imports and Exports
Where it applies
United States
Source
CBP CSMS

From the notice

The Government of Nauru passed a constitutional amendment to change the name of the Republic of Nauru to the “Republic of Naoero”. Automated Export System Trade Interface Requirements (AESTIR) will be implementing the update to the Appendix C as listed above. Documentation is available under the ACE AESTIR, Appendix C in the AES webpage which can be located at: https://www.cbp.gov/document/technical-documentation/ace-aestir-appendix-commodity-filing-response-messages

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