Changes made by Council Directive 81/851/EEC of 28 September 1981 on the approximation of the laws of the Member States relating to veterinary medicinal products
EU Directive 1981/851
No changes made by Council Directive 81/851/EEC of 28 September 1981 on the approximation of the laws of the Member States relating to veterinary medicinal products are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.