107.04  USE AND PARKING OF VEHICLES.
   (a)    The use of City-owned vehicles for other than the performance of official duty or City work is prohibited.
   (b)   The director of each department of the executive branch shall be responsible for the use by subordinates of City-owned vehicles assigned to his department and shall prescribe rules and regulations governing such use.
   (c)   All City-owned vehicles not expressly permitted to be kept elsewhere when not in use for official duty or City work shall be kept on City property or in approved parking areas on the public streets of the City, as designated by the department head in such cases.
(1964 Code §201.34)