Changes made by 83/400/EEC: Commission Decision of 11 July 1983 relating to a proceeding under Article 85 of the EEC Treaty (IV/29.395 - Windsurfing International) (Only the German and English texts are authentic)
EU Decision 1983/400
No changes made by 83/400/EEC: Commission Decision of 11 July 1983 relating to a proceeding under Article 85 of the EEC Treaty (IV/29.395 - Windsurfing International) (Only the German and English texts are authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.