4.—(1) Without prejudice to regulation 5 (general duties) of the General Duties Regulations and subject to paragraph (2), these Regulations apply in relation to activities in which workers are subject to, or are potentially subject to exposure to, electromagnetic fields on United Kingdom ships.
(2) Where—
(a)a ship is being used in the course of public service activities or activities for the purposes of the civil protection services, and
(b)characteristics peculiar to those activities inevitably conflict with a provision of these Regulations,
that provision does not apply in relation to activities on that ship to the extent of that conflict.
(3) To the extent that a provision of these Regulations does not apply in relation to activities on a ship because of paragraph (2), there is in relation to that ship a duty of the employer to ensure, so far as is reasonably practicable, the health and safety of the workers who are subject, or are potentially subject, to exposure on the ship.
(4) This regulation (other than paragraph (1)) and regulations 14 and 16 apply in relation to activities on ships other than United Kingdom ships, which are for the time being in United Kingdom waters, during which workers are subject, or potentially subject, to exposure to electromagnetic fields.
(5) In this regulation—
“civil protection service” includes the fire and rescue and ambulance services, and search and rescue services provided by any other person; and
“public service activities” includes the activities of the armed forces, HM Coastguard, HM Revenue and Customs, immigration officers, police, prison officers and the security and intelligence services.