Changes made by 92/264/EEC: Council Decision of 11 May 1992 on the introduction of a standard international telephone access code in the Community
EU Decision 1992/264
No changes made by 92/264/EEC: Council Decision of 11 May 1992 on the introduction of a standard international telephone access code in the Community are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.