8.—(1) Every person shall co-operate—
(a)with the installation manager, and any other person on whom any duty is placed by regulations 5 to 19, so far as is necessary to enable him to comply with the relevant statutory provisions, including this regulation;
(b)with the installation manager, so far as is necessary to enable him to discharge his functions described in regulations 6 and 7; and
(c)with the helicopter landing officer, so far as is necessary to enable him to perform his function referred to in regulation 13.
(2) In addition to the duty placed on him by paragraph (1), an installation manager shall co-operate with the manager of another offshore installation, where an activity carried out from, by means of, or on one of the installations could affect the health and safety of persons on the other installation or of persons engaged in an activity in connection with the other installation.
(3) The duty in paragraph (1) is without prejudice to any duty owed by a master, captain or person in charge of any vessel or aircraft.