Changes made by 77/284/EEC: Commission Decision of 5 April 1977 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as Lock-in Amplifier, P.A.R. model 120
EU Decision 1977/284
No changes made by 77/284/EEC: Commission Decision of 5 April 1977 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as Lock-in Amplifier, P.A.R. model 120 are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.