Each operation of a taxi within the city, without there being in existence a currently valid owner’s license and operator’s license therefor, required as prescribed herein, shall be a separate violation of this chapter, shall be deemed guilty of every violation of this chapter by any employee or agent. Any person owning or conducting a taxi business or operating a taxi in violation of this chapter, shall be guilty of a misdemeanor and upon conviction thereof be punished by a fine not exceeding one hundred dollars.