Assessment and verification of constancy of performance of construction products in relation to their essential characteristics shall be carried out in accordance with one of the systems set out in Annex V.

By means of F1regulations in accordance with Article 60, the F2Secretary of State may establish and may revise, taking into account in particular the effect on the health and safety of people, and on the environment, which system or systems are applicable to a given construction product or family of construction products or a given essential characteristic. F3...

The F4Secretary of State shall choose the least onerous system or systems consistent with the fulfilment of all basic requirements for construction works.

The system or systems thus determined shall be indicated in the F5standardisation mandates, standards prepared under Article 18A, and UK Assessment Documents.