This is the relevant Section 7 from CAO 95.7 for helicopter operations in Australia:
7 EXEMPTION FROM GENERAL REQUIREMENT FOR PILOT TO BE AT
CONTROLS
7.1 If the condition set out in paragraph 7.2 is complied with, a helicopter is exempt from compliance with subregulation 225(1) (but not subregulation 225(2)) and subregulation 230(2) of the regulations.
7.2 The exemption given by paragraph 7.1 in relation to a helicopter is subject to the condition that a pilot must, from the time of starting the engine or engines until the time of stopping the engine or engines at the end of the flight, be at the controls of the helicopter unless:
(a) the helicopter is fitted with skid type landing gear; and
(b) the helicopter is fitted with a serviceable means of locking the cyclic and collective controls; and
(c) if a passenger occupies a control seat fitted with fully or partially functioning controls or is seated in a position where he or she is able to interfere with such controls the controls are locked and the pilot is satisfied that the passenger will not interfere with the controls; and
(d) the pilot considers that his or her absence from the cockpit is essential to the safety of the helicopter or of the persons on, or in the vicinity of, the helicopter; and
(e) the pilot remains in the immediate vicinity of the helicopter.