Changes made by 79/813/EEC: Commission Decision of 14 September 1979 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'PAR lock-in amplifier, model 126 with preamplifier model 117'
EU Decision 1979/813
No changes made by 79/813/EEC: Commission Decision of 14 September 1979 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'PAR lock-in amplifier, model 126 with preamplifier model 117' are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.