Every driver's permit issued hereunder shall set forth the name of the owner by whom said driver is employed, and shall be valid only so long as he continues in the employment of said owner. Upon the termination of such employment, the said driver shall forthwith surrender his driver's permit to his employer. No such driver's permit shall be issued to anyone under the age of twenty-one years. Such driver's permit may be denied upon substantial evidence of facts of either physical or moral deficiencies of the applicant which, in the sound discretion of the Chief of Police, supported by the City Manager, would render such applicant an incompetent person to operate a jitney bus. No such driver's permit issued hereunder shall be transferable. Upon the termination of employment of any driver, the owner for whom such driver has been working shall immediately give the Chief of Police written notice of termination and surrender of the driver's permit of said driver. (Ord. 2267 § 1 (part); March 22, 1966.)