Any vehicle towing service shall provide continuous operations, twenty four (24) hours per day, seven (7) days per week, including holidays. Facilities shall be open and available for release of vehicles, at a minimum, between the hours of nine o'clock (9:00) A.M. through four o'clock (4:00) P.M. of each day Monday through Friday, excluding holidays. (1962 Code § 6-21.101 et seq.)