Changes to 79/548/EEC: Commission Decision of 31 May 1979 extending the period of application of the systems of authorization for trade in crude oil and/or petroleum products between certain Member States provided for by Decisions 79/126/EEC, 79/135/EEC and 79/397/EEC (Only the French and Dutch texts are authentic)
EU Decision 1979/548
No changes to 79/548/EEC: Commission Decision of 31 May 1979 extending the period of application of the systems of authorization for trade in crude oil and/or petroleum products between certain Member States provided for by Decisions 79/126/EEC, 79/135/EEC and 79/397/EEC (Only the French and Dutch texts are authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.