Changes made by Commission Decision of 15 June 1979 laying down detailed rules for the implementation of Council Decision 77/706/EEC (79/639/EEC)
EU Decision 1979/639
No changes made by Commission Decision of 15 June 1979 laying down detailed rules for the implementation of Council Decision 77/706/EEC (79/639/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.