Refusal to grant or revocation of permit
22F.—(1)  The Registrar may refuse to grant a permit, or may revoke a permit already granted, without assigning any reason, if —
(a)he is satisfied that the permit applied for or granted is not the appropriate permit for the motor vehicle in question;
(b)he considers that the motor vehicle is unsuitable for use on the road;
(c)he considers that the motor vehicle has been or is intended to be used for an unlawful purpose or in an unlawful manner;
(d)it appears to him that the person applying for or holding the permit is not a fit and proper person to hold the permit; or
(e)it appears to him that there has been a breach of any of the conditions under which the permit is granted, or the driver of the motor vehicle has failed to comply with any of the rules under this Part.
(2)  For the purposes of satisfying himself in regard to any of the matters specified in paragraph (1)(a) to (e), the Registrar may —
(a)require the motor vehicle to be produced for inspection; or
(b)require the driver or owner of the motor vehicle to produce such evidence as the Registrar considers appropriate.