Changes made by 77/493/EEC: Commission Decision of 20 July 1977 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'GE(LI) Coaxial Detector ORTEC' , model 8501-1020-S with Dewar and ORTEC pre-amplifier
EU Decision 1977/493
No changes made by 77/493/EEC: Commission Decision of 20 July 1977 excluding from admission free of Common Customs Tariff duties the scientific apparatus described as 'GE(LI) Coaxial Detector ORTEC' , model 8501-1020-S with Dewar and ORTEC pre-amplifier are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.