Changes made by 79/93/EEC: Commission Decision of 29 December 1978 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 1979/93
No changes made by 79/93/EEC: Commission Decision of 29 December 1978 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.