Changes made by 83/390/EEC: Commission Decision of 13 July 1983 relating to a proceeding under Article 85 of the EEC Treaty (IV/30.437 - Rockwell/Iveco) (Only the Dutch, English and Italian texts are authentic)
EU Decision 1983/390
No changes made by 83/390/EEC: Commission Decision of 13 July 1983 relating to a proceeding under Article 85 of the EEC Treaty (IV/30.437 - Rockwell/Iveco) (Only the Dutch, English and Italian texts are authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.