57.—(1) In any proceedings for an offence of contravening a provision of these Regulations listed in Part I of Schedule 6, it shall be a defence for the person charged to prove that he or she took all reasonable precautions and exercised all due diligence to avoid the commission of the offence by himself, herself or by a person under his or her control.
(2) If in any case the defence provided by paragraph (1) involves the allegation that the commission of the offence was due to an act or default of another person, or to reliance on information supplied by another person, the person charged shall not, without leave of the Court, be entitled to rely on that defence, unless—
(a)at least seven clear days before the hearing; and
(b)where he or she has previously appeared, or been brought, before a court in connection with the alleged offence, within one month of his or her first such appearance,
the person charged has served on the prosecutor a notice in writing giving such information identifying or assisting in the identification of that other person as was then in his or her possession.