The Comptroller shall cancel a licence or a permit under this Act if—
(a) the holder of the licence or the permit is convicted of any offence involving fraud or dishonesty;
(b) the holder of the licence or the permit is found to be knowingly concerned with evading or attempting to evade the provisions of this Act or of the Customs (Control and Management) Act relating to the importation or exportation of any goods, in connection with the duty-free shopping system; or
(c) after due consideration and determination in the prescribed manner of any application made in the prescribed form—
(i) by any person, or
(ii) by any organisation or association recognised by the Comptroller as representing operators of duty-free shops,
requesting that the licence or permit be cancelled, he or she is satisfied that the holder is no longer a fit and proper person to hold such licence or permit.