Without prejudice to Article 4 of Council Directive 90/677/EEC of 13 December 1990 extending the scope of Directive 81/851/EEC on the approximation of the laws of the Member States relating to veterinary medicinal products (16), and laying down additional provisions for immunological veterinary medicinal products, a marketing authorization which has been granted in accordance with the procedure laid down in this Regulation shall apply throughout the Community.