The Police Department may suspend or revoke a permit issued hereunder whenever:
(a) There is a violation of any of these sections or of any State or Federal law or regulation pertaining to the operations permitted hereunder.
(b) State Department of Aeronautics or Federal Aviation Administration approval of the operations permitted hereunder is suspended or withdrawn for any reason.
(c) There has been a material change in circumstances since the granting of the permit which would have precluded issuance of the permit if such changed circumstances had been in existence at the time of the application.
(d) Conditions of the permit have been violated.
(Added by Ord. 392-73, App. 10/19/73)