Whenever in this code or any other ordinance of the city, or in any rule, regulation, notice or order promulgated by any officer or agency of the city under authority duly vested in him, her or it, any act is prohibited or is declared to be unlawful or an offense, misdemeanor or ordinance violation or the doing of any act is required or the failure to do any act is declared to be unlawful or an offense, misdemeanor or ordinance violation, and no specific penalty is provided for the violation thereof, upon conviction of a violation of any such provision of this code or of any such ordinance, rule, regulation, notice or order, the violator shall be punished by a fine not exceeding $500 or by imprisonment in the city or county jail not exceeding 90 days, or by both such fine and imprisonment; provided, that in any case wherein the penalty for an offense is fixed by a statute of the state, the statutory penalty, and no other, shall be imposed for such offense, except that imprisonments may be in the city prison or workhouse instead of the county jail. Provided however, that if state statutes provide a lesser maximum penalty for any offense or category of offenses such lesser maximum shall apply in lieu of the provisions of this section.