If an exporter is a member of a diamond organisation listed F1in the list of self-regulating diamond organisations, as published by the Secretary of State for the purposes of Article 17, F2the United Kingdom competent authority may accept as conclusive evidence of lawful import into the F3United Kingdom a signed declaration by the exporter to that effect. Such a declaration shall contain at least the information to be given in an invoice under Article 17(2)(a)(ii).