Changes made by 83/667/EEC: Commission Decision of 5 December 1983 relating to a proceeding under Article 85 of the EEC Treaty (IV/30.671 - IPTC Belgium) (Only the French text is authentic)
EU Decision 1983/667
No changes made by 83/667/EEC: Commission Decision of 5 December 1983 relating to a proceeding under Article 85 of the EEC Treaty (IV/30.671 - IPTC Belgium) (Only the French text is authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.