# Commission Delegated Regulation (EU) 2020/473 of 20 January 2020 supplementing Directive (EU) 2017/2397 of the European Parliament and of the Council with regard to the standards for databases for the Union certificates of qualification, service record books and logbooks, Division 3.1: Verification of the crew member’s registration in the Union database:

Extent: E+W+S+N.I.

The Union database shall allow certification and enforcement authorities to check, whether a crew member is already registered in the system. This shall be done either on the basis of a crew member identification number (CID) or of data contained in an identity document provided by the crew member. In the case of on-line services, the identification of a crew member shall be made with the support of the dataset as set out under Regulation (EU) 2015/1501.
Providing no person with a similar identity-related dataset is found in the system following a search by a certification authority, the crew member shall be registered in the system.

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Source: https://www.legislation.gov.uk/eur/2020/473/annex/I/division/3/division/3.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-473/annex-I/division-3/division-3.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.