Any license or permit granted under this chapter may be revoked
or suspended at any time by the City Clerk if the holder thereof violates
any of the provisions of this chapter or any regulations which may
be promulgated relating to this chapter; provided, however, that prior
to any such suspension or revocation the City Clerk shall advise the
holder of such license or permit of his intention to take such action
and the grounds therefor and shall provide the holder with an opportunity
to be heard thereon.