Changes made by 80/566/EEC: Commission Decision of 23 May 1980 authorizing certain Member States to provide for derogations from certain provisions of Council Directive 77/93/EEC in respect of oak wood originating in Canada (Only the French, German, Italian and Dutch texts are authentic)
EU Decision 1980/566
No changes made by 80/566/EEC: Commission Decision of 23 May 1980 authorizing certain Member States to provide for derogations from certain provisions of Council Directive 77/93/EEC in respect of oak wood originating in Canada (Only the French, German, Italian and Dutch texts are authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.