3.—(1) Within the territorial sea these Regulations shall apply only to and in relation to the premises and activities to which paragraph 6(1)(a) of Schedule 1 applies.
(2) Subject to paragraphs (3) to (5), these Regulations shall apply to and in relation to construction work.
(3) The duties under Part 3 shall apply only where a project—
(a)is notifiable; and
(b)is carried out for or on behalf of, or by, a client.
(4) Part 4 shall apply only in relation to a construction site.
(5) Regulations 9(1)(b), 13(7), 22(1)(c), and Schedule 3 shall apply only in relation to persons at work who are carrying out construction work.