Changes made by 76/311/EEC: Council Decision of 15 March 1976 adopting a research programme (1976 to 1980) for the European Economic Community in the environmental field (indirect action)
EU Decision 1976/311
No changes made by 76/311/EEC: Council Decision of 15 March 1976 adopting a research programme (1976 to 1980) for the European Economic Community in the environmental field (indirect action) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.