(1) A statement heard by an inspector while executing a lawful search under this Act is admissible in evidence in a prosecution for an offence against this Act as to the truth of the contents of the statement.
(2) In estimating the weight, if any, to be attached to the statement, the trier of fact must consider all the circumstances from which an inference can reasonably be drawn as to the accuracy or truth of the statement including, where applicable:
(a) if there is evidence of greater weight reasonably available to be tendered that is not tendered; or
(b) the presence or absence of any incentive for any person concerned in making the statement, or dealing with the statement, to conceal or misrepresent any relevant matter in the statement.