1.Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with this Directive by 14 September 2018. They shall immediately inform the Commission thereof.
2.By way of derogation from paragraph 1 of this Article, Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with Article 4(3) and Article 4(4) of Directive 91/477/EEC, as amended by this Directive, by 14 December 2019. They shall immediately inform the Commission thereof.
3.When Member States adopt the measures under paragraphs 1 and 2, they shall contain a reference to this Directive or shall be accompanied by such a reference on the occasion of their official publication. The methods of making such reference shall be laid down by Member States.
4.Notwithstanding paragraph 1, Member States may, as regards firearms acquired before 14 September 2018, suspend the requirement to declare firearms classified in point 5, 6 or 7 of category C until 14 March 2021.
5.Member States shall communicate to the Commission the text of the main measures of national law which they adopt in the field covered by this Directive.