Whenever in this code or in any ordinance of the city an act is prohibited or is made or declared to be unlawful or an offense or a misdemeanor, or whenever in such code or ordinance the doing of any act is required or the failure to do any act is declared to be unlawful, where no specific penalty is provided therefor, the violation of any such provision of this code or any ordinance shall be punished by a fine not exceeding three hundred dollars or by imprisonment not exceeding ninety days, or by both such fine and imprisonment. Each day any violation of any provision of this code or of any ordinance continues shall constitute a separate offense. (Prior code § 1-4).