Only if the above checks give unsatisfactory results shall the notified body carry out noise tests, which, on its own judgement and experience, may be simplified or completely carried out according to the provisions laid down in Annex III for the relevant type of equipment,
— the notified body shall carry out or have carried out product checks at random intervals. An adequate sample of the final equipment, chosen by the notified body, must be examined and appropriate noise tests as set out in Annex III, or equivalent tests, must be carried out to check the conformity of the product with the relevant requirements of the Directive. The product checking must include the following aspects:
— the correct and complete marking of the equipment according to Article 11,
— issuing of the EC declaration of conformity according to Article 8.