(1) Before obtaining the consent of a person for the purposes of paragraph 31(1A)(a), the authorised person must inform the person that the person may refuse consent.
(2) A consent of a person is not effective for the purposes of paragraph 31(1A)(a) unless the consent is voluntary.
(3) If an authorised person entered land or premises or a vehicle, ship or aircraft because of the consent of a person, the authorised person must leave the land, premises, vehicle, ship or aircraft if the person withdraws the consent.