13. Where an enforcement authority has reasonable grounds for believing that a product is a dangerous product in that it could pose risks for certain persons, the authority may serve a notice (“a requirement to warn”) requiring the person on whom the notice is served at his own expense to undertake one or more of the following, as specified in the notice—
(a)where and to the extent it is practicable to do so, to ensure that any person who could be subject to such risks and who has been supplied with the product be given warning of the risks in good time and in a form specified in the notice,
(b)to publish a warning of the risks in such form and manner as is likely to bring those risks to the attention of any such person,
(c)to ensure that the product carries a warning of the risks in a form specified in the notice.