(1) Before obtaining the consent of a person for the purposes of section 55, an authorised officer shall—
(a) produce his or her identity card; and
(b) inform the person that he or she may refuse to give consent.
(2) Where an authorised officer obtains the consent of a person for the purposes of section 55, the officer shall ask the person to sign a written acknowledgment of—
(a) the fact that the person has been informed that he or she may refuse to give consent;
(b) the fact that the person has voluntarily given consent; and
(c) the day on which, and the time at which, the consent was given.
(3) An entry by an authorised officer by virtue of a person's consent is not lawful unless the consent was voluntary.
(4) Where—
(a) it is material, in any proceedings, for a court to be satisfied that the consent of a person for the purposes of section 55 was voluntary; and
(b) an acknowledgment, in accordance with subsection (2), signed by the person is not produced in evidence;
the court shall assume, unless the contrary is proved, that the consent was not voluntary.