Changes made by 79/673/EEC: Commission Decision of 13 July 1979 excluding from admission free of Common Customs Tariff duties the scientific apparatuses described as 'EDAX-Si(Li) detecting unit, model PSEM 500' and 'EDAX-EXAM-MAX-System F, model 939'
EU Decision 1979/673
No changes made by 79/673/EEC: Commission Decision of 13 July 1979 excluding from admission free of Common Customs Tariff duties the scientific apparatuses described as 'EDAX-Si(Li) detecting unit, model PSEM 500' and 'EDAX-EXAM-MAX-System F, model 939' are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.