Changes to EEC: Regulation No 58 of the Commission laying down common quality standards for certain products listed in Annex I B to Regulation No 23 on the progressive establishment of a common organisation of the market in fruit and vegetables
EU Regulation No 58/1962
Made by Regulation (EEC) No 1591/87 laying down quality standards for Brussels sprouts, ribbed celery and spinach
From legislation.gov.uk's record of changes, the official one: see it there.