Changes made by 81/971/EEC: Council Decision of 3 December 1981 establishing a Community information system for the control and reduction of pollution caused by hydrocarbons discharged at sea
EU Decision 1981/971
No changes made by 81/971/EEC: Council Decision of 3 December 1981 establishing a Community information system for the control and reduction of pollution caused by hydrocarbons discharged at sea are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.