12.—(1) The Secretary of State may serve on any person a notice (“a notice to warn”) requiring that person, at that person's own expense, to publish, in a form and manner and on occasions specified in the notice, a warning about any construction products which that person supplies or has supplied which are described in the notice and in respect of which the Secretary of State —
(a)has reasonable grounds for suspecting that any offence under regulation 4 or 5 has been committed; or
(b)considers that there are grounds for the service of a notice to warn in accordance with Schedule 1 (grounds for service of notices in relation to the 2008 Regulation and the 2011 Regulation).
(2) Schedule 4 shall have effect with respect to notices to warn.
(3) A person who contravenes a notice to warn shall be guilty of an offence and liable on summary conviction to imprisonment for a term not exceeding three months or to a fine not exceeding level 5 on the standard scale or to both.