Member States shall bring into force the laws, regulations and administrative provisions, including any sanctions, necessary to comply with this Directive not later than 31 December 1999, subject to any different decision taken by the Council in the light of the report referred to in Article 8. They shall forthwith inform the Commission thereof.

When Member States adopt these measures, they shall contain a reference to this Directive or shall be accompanied by such reference on the occasion of their official publication. The methods of making such reference shall be laid down by Member States.

However, after 31 December 1999, Member States may, in compliance with the general rules of the Treaty, maintain or apply within their territories stricter provisions for the protection of animals kept for farming purposes than those laid down in this Directive. They shall inform the Commission of any such measures.

Member States shall communicate to the Commission the texts of the main provisions of national law which they adopt in the field governed by this Directive.