The city council may set by resolution the maximum rates to be charged per flag drop, per mile and per minute of waiting time or traffic delay time. In the event such a resolution is adopted, it shall be unlawful for the taxicab operator or driver to fix, charge, collect or receive a rate in excess of the rates established and set by resolution of the city council. Any charge or rate in excess of the rate set by resolution of the city council shall be cause for revocation of the operator’s permit. (Ord. No. 1399, § 3 (part).)