An annual inspection must be conducted of products with certificates pursuant to Section 4-5. Such inspection must be conducted by the certification body that issued the certificate or by a competent body which pursuant to an agreement is authorised to perform the inspection on behalf of the certification body. If the certification body no longer exists, the inspection can be conducted by another certification body.The inspection must comprise a selection of the product’s fundamental qualities and functional requirements. These must be checked against the product information provided on the certificate. Furthermore, the inspection must verify that the instructions for marking, installation and use are in line with Sections 4-3 and 4-4. The inspection must be documented in a written report.