Article 2
1. The proof referred to in Article 1(1) shall be deemed to be furnished where the reproductive material is of the category "source-identified reproductive material" as defined in the Organisation for Economic Cooperation and Development (OECD) scheme for the control of forest reproductive material moving in international trade, or of any other category defined in that scheme. 2. Where the OECD scheme referred to in paragraph 1 is not used at the place of provenance of the reproductive material, other official evidence shall be admissible. 3. Where official evidence cannot be provided, Member States may accept other unofficial evidence.