If mistake of fact is relevant to determining liability for an offence, a body corporate may rely on mistake of fact only if:
(a) the employee, agent or officer of the body corporate who engaged in the conduct constituting the offence was under a mistaken but reasonable belief about facts that, had they existed, would have meant the conduct would not have constituted the offence; and
(b) the body corporate proves it took reasonable precautions to prevent the conduct.