13.—(1) A person required to take reasonable measures under regulation 12 must have regard to guidance issued by the Welsh Ministers about those measures.
(2) The Welsh Ministers—
(a)may revise guidance issued under paragraph (1), and
(b)must publish the guidance (and any revisions).
(3) Guidance under this regulation may incorporate (by reference or transposition) guidance, codes of practice or other documents published by another person (for example, a trade association, body representing members of an industry or a trade union).