How will declarant get access to the CBAM Registry in the definitive period?
Once an importer’s application has been authorised by the competent authority, they will be considered an authorised CBAM declarant. Each CBAM declarant will be assigned a CBAM account number by the Commission, which will then allow access to the CBAM registry.
The access management in the definitive period will also be performed via the EU-wide UUM&DS. This means that declarants will have the ability to access the CBAM Definitive system using either Option 1 (CBAM Domain) or Option 2 (Customs Domain), depending on the choice made by the national authorities.
New UUMDS profiles will be required for the definitive registry. NCAs will need to assign these new profiles to existing declarants to ensure their access to the definitive system.
In the definitive period, third-country operators will also be able to access the CBAM Registry. Third-country operators will use the Commission’s DG DIGIT's EU-Access platform to access the CBAM portal. The Commission will validate access requests from third-country operators and grant access where appropriate. If access to the platform needs to be revoked, the Commission will consult Member States.
Source: EC’s Questions and Answers on CBAM