The road transport authority may suspend or cancel a taxi operator's licence or restricted taxi operator's licence if—
(a) satisfied the taxi or restricted taxi has been used for an illegal purpose; or
(b) the licence or, for a taxi operator's licence, any transfer of the licence, was obtained by a false statement or misrepresentation; or
(c) the vehicle is not an insured motor vehicle for Part 10 (Compulsory vehicle insurance); or
(d) the licence holder has not maintained a public vehicle policy for the vehicle.