Changes made by 74/120/EEC: Council Decision of 18 February 1974 on the attainment of a high degree of convergence of the economic policies of the Member States of the European Economic Community
EU Decision 1974/120
The legislation 74/120/EEC: Council Decision of 18 February 1974 on the attainment of a high degree of convergence of the economic policies of the Member States of the European Economic Community changes, newest first. Choose one to see each change.
From legislation.gov.uk's record of changes, the official one: see it there.