Changes made by 79/321/EEC: Commission Decision of 13 March 1979 allowing admission free of Common Customs Tariff duties of the scientific apparatus described as 'Plessey recording current meter, model 9021'
EU Decision 1979/321
No changes made by 79/321/EEC: Commission Decision of 13 March 1979 allowing admission free of Common Customs Tariff duties of the scientific apparatus described as 'Plessey recording current meter, model 9021' are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.