Changes made by 79/522/EEC: Commission Decision of 18 May 1979 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'Ortec-Si(Li) X-ray detector, model 7400-0455-S, with preamplifier, model 1178 and detector bias supply, model 459'
EU Decision 1979/522
No changes made by 79/522/EEC: Commission Decision of 18 May 1979 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'Ortec-Si(Li) X-ray detector, model 7400-0455-S, with preamplifier, model 1178 and detector bias supply, model 459' are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.