(2) Where any controlled drug is found on any premises searched under section 33(1), or in any ship, vessel, boat, aircraft, vehicle or other means of conveyance of any description stopped under section 33(2), the police officer who has made the search or stopped the ship, vessel, boat, aircraft, vehicle or other means of conveyance of any description, as the case may be, may arrest without warrant any person in such premises or in such ship, vessel, boat, aircraft, vehicle or other means of conveyance of any description whom he or she has reason to believe to be guilty of an offence under this Act.