Changes made by 78/594/EEC: Commission Decision of 16 June 1978 completing the Commission Decision of 23 May 1977 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'Two-phase/vector lock-in-amplifier PAR model 129A'
EU Decision 1978/594
No changes made by 78/594/EEC: Commission Decision of 16 June 1978 completing the Commission Decision of 23 May 1977 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'Two-phase/vector lock-in-amplifier PAR model 129A' are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.