1. Without prejudice to Article 5, the competent authority shall at regular intervals carry out official controls and supervision of the handling of animal by-products and derived products falling within the scope of this Regulation.
2. Articles 41 and 42 of Regulation (EC) No 882/2004 shall apply mutatis mutandis to official controls carried out to verify compliance with this Regulation.
3. The competent authority may take into account adherence to guides to good practice, when carrying out its official controls.
4. Detailed arrangements for implementing this Article, including rules concerning the reference methods for microbiological analyses, may be laid down.
Those measures, designed to amend non-essential elements of this Regulation by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 52(4).