3.
2013/488/EU: Council Decision of 23 September 2013 on the security rules for protecting EU classified information · European Union
Where Member States introduce classified information bearing a national security classification marking into the structures or networks of the Union, the Council and the GSC shall protect that information in accordance with the requirements applicable to EUCI at the equivalent level as set out in the table of equivalence of security classifications contained in Appendix B.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.