No person shall stop, stand, or park a vehicle for any purpose or length of time other than for the expeditious loading or unloading of persons or materials in a place designated as a loading zone when the hours applicable to that loading zone are in effect. When the hours applicable to the loading zone are in effect, the loading and unloading shall not exceed the time limits posted. If no time limits are posted, then the use of the zone shall not exceed 10 minutes for loading or unloading of merchandise from a private vehicle or 30 minutes for loading or unloading materials or freight from a commercial vehicle. (Ord. 1986 § 3 (Exh. A), 2014)