1. Member States may introduce either official lists of approved contractors, suppliers or service providers or certification by certification bodies established under public or private law.

Member States shall adapt the conditions for registration on these lists and for the issue of certificates by certification bodies to the provisions of Article 39(1) and (2)(a) to (d) and (h), Article 40, Article 41(1), (4) and (5), Article 42(1)(a) to (i), (2) and (4), Article 43 and, where appropriate, Article 44.