Changes made by 85/58/EEC: Commission Decision of 19 December 1984 authorizing the United Kingdom to restrict the marketing of seed of certain varieties of agricultural plant species (Only the English text is authentic)
EU Decision 1985/58
No changes made by 85/58/EEC: Commission Decision of 19 December 1984 authorizing the United Kingdom to restrict the marketing of seed of certain varieties of agricultural plant species (Only the English text is authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.