Changes to Regulation (EEC) No 2114/71 of the Council of 28 September 1971 on the subsidy for oil seeds
EU Regulation No 2114/1971
Made by Regulation (EEC) No 851/78 amending Regulation (EEC) No 2114/71 on the subsidy for oil seeds
From legislation.gov.uk's record of changes, the official one: see it there.