18.—(1) In relation to personal protective equipment which protects a person in an emergency against risks to his health and safety—
(a)in conditions of fire, heat, smoke, fumes or toxic gas; or
(b)in the event of his immersion in the sea,
the duty holder shall, for the purposes of the Personal Protective Equipment at Work Regulations 1992(1), be treated as the only employer of all persons on the installation, and such persons shall be treated as only employed by him.
(2) The duty holder shall ensure that there is prepared and operated a written scheme for the systematic examination and, where appropriate, testing, by a competent person, of the equipment referred to in paragraph (1) and for recording the results thereof.