6.—(1) Subject to paragraph (6)(b), every client shall appoint—
(a)a planning supervisor; and
(b)a principal contractor,
in respect of each project.
(2) The client shall not appoint as principal contractor any person who is not a contractor.
(3) The planning supervisor shall be appointed as soon as is practicable after the client has such information about the project and the construction work involved in it as will enable him to comply with the requirements imposed on him by regulations 8(1) and 9(1).
(4) The principal contractor shall be appointed as soon as is practicable after the client has such information about the project and the construction work involved in it as will enable the client to comply with the requirements imposed on him by regulations 8(3) and 9(3) when making an arrangement with a contractor to manage construction work where such arrangement consists of the appointment of the principal contractor.
(5) The appointments mentioned in paragraph (1) shall be terminated, changed or renewed as necessary to ensure that those appointments remain filled at all times until the end of the construction phase.
(6) Paragraph (1) does not prevent—
(a)the appointment of the same person as planning supervisor and as principal contractor provided that person is competent to carry out the functions under these Regulations of both appointments; or
(b)the appointment of the client as planning supervisor or as principal contractor or as both, provided the client is competent to perform the relevant functions under these Regulations.