(1) A product certification body must have procedures for certifying each building method or product that are based on evidence established by—
(a) testing the building method or product; and
(b) assessing a quality plan prepared by the proprietor of the building method or product in respect of the building method or product.
(2) In the case of a building method or product that is a tangible product, the product certification body must test, or arrange for the testing of, samples supplied to ascertain whether or not the product meets the criteria and standards specified in regulation 10(a).
(3) The product certification body must also conduct site audits of the factory or, as the case may be, the construction site where the building method or product is applied or produced.