Section 21.52 - Vehicular Operation on Airport Highways or Vehicular Parking and Storage Areas(1) The operator of a vehicle on such areas (Airport highways or vehicular parking and storage areas) at the Airport must at all times comply with any lawful order, signal or direction of an authorized representative of the Executive Director. When traffic upon such highways or areas is controlled by traffic lights, signs, pavement markings or by mechanical or electrical signals such lights, signs, markings and signals shall be obeyed, unless an authorized representative of the Executive Director directs otherwise.(2) No person shall stop or park a vehicle or cause a vehicle to be stopped or parked: (a) In front of a driveway.(b) Within a bus stop, safety zone, limousine or taxicab zone or other prohibited area except vehicles authorized to use such areas.(c) In buildings or areas other than those designated for the purpose of washing, greasing or repairing a vehicle, except repairs necessitated by an emergency, and except those vehicles temporarily parked or stopped in the course of actively performing authorized and essential airline functions.(d) On the roadway side of any stopped or parked vehicle (double parking).(e) Within a radius of 20 feet of a fire hydrant.(f) Other than in accordance with restrictions posted on authorized signs or indicated by painted markings on pavements or curbs.(3) No person shall park a vehicle within any vehicular parking and storage area except upon the payment of such parking tariff or charge as may from time to time be prescribed by the Authority. No person shall refuse to pay or evade or attempt to evade the payment of such tariffs or charges.(4) No person shall park a vehicle in any area designated "For Employee Parking Only" unless such person has obtained authorization for such parking from the Manager and can produce valid evidence of such authorization.