This is an informational message. No action is required. 1. AD/CVD investigations generally cover products from a particular country. In some cases, however, products from the country subject to the AD/CVD investigation may undergo completion or assembly in a third country prior to export or sale to the United States. The products may remain subject to the AD/CVD investigation despite the completion or assembly that occurs in the third country. However, for CBP purposes, the country of origin for such products may be the third country where the completion or assembly occurred. For technical reasons, the country of the AD/CVD case number must match the CBP country of origin in the entry summary documentation. Accordingly, Commerce establishes third country AD/CVD case numbers that match the CBP country of origin for CBP purposes. 2. The merchandise covered by this investigation is described in message number 4135421 dated 05/14/2024. 3. Effective 05/07/2024, Commerce established a third-country case number to allow aluminum extrusions completed/assembled in Canada to be properly reported as subject to the less-than-fair-value investigation of aluminum extrusions from the People's Republic of China (A-570-158) upon entry. Third Country: Canada Case Number: A-122-158 Producer and/or Exporter: All Others Case Number: A-122-158-000 Cash Deposit Rate: 365.19 % The third country case numbers above have been assigned for CBP purposes. 4. If there are any questions by the importing public regarding this message, please contact the Call Center for the Office of AD/CVD Operations, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce at (202) 482-0984. CBP ports should submit their inquiries through authorized CBP channels only. (This message was generated by OIV:HS). 5. There are no restrictions on the release of this information. Alexander Amdur