It shall not be a good defence for a person charged under section 49 of the Principal Act with driving or attempting to drive a mechanically propelled vehicle in a public place while he was under the influence of intoxicating liquor or a drug to such an extent as to be incapable of having proper control of the vehicle to show that -
(a) an analysis or determination under this Part has not been carried out, and
(b) he has not been required under section 30(1)(a) or 33(1)(a) to provide a specimen of his breath.