Changes made by 83/641/EEC: Council Decision of 12 December 1983 adopting joint research programmes and programmes for coordinating agricultural research
EU Decision 1983/641
No changes made by 83/641/EEC: Council Decision of 12 December 1983 adopting joint research programmes and programmes for coordinating agricultural research are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.