Any officer authorised under section 42, may, if he has reason to suspect that any animal or conveyance is, or is about to be, used for the transport of any narcotic drug or psychotropic substance or controlled substance, in respect of which he suspects that any provision of this Act has been, or is being, or is about to be, contravened at any time, stop such animal or conveyance, or, in the case of an aircraft, compel it to land and —