13.3.1 Use of parking area, stacking area, or loading space. All vehicular parking areas, stacking areas, and loading spaces required by this article shall be used only for those purposes. Any other use, including, but not limited to, vehicular storage, vehicle sales, vehicular repair work, vehicle service, or display of any kind, shall constitute a separate use of the space.
13.3.2 Identified as to purpose and location when not clearly evident. Off-street parking areas of three or more spaces and off-street loading areas shall include painted lines, wheel stops, or other methods of identifying individual parking spaces and loading areas and distinguishing such spaces from aisles.
13.3.3 Surfacing. All off-street parking, loading, and stacking areas shall be surfaced with asphalt, concrete, brick, stone, pavers, or an equivalent material. These materials shall be maintained in a smooth, well-graded condition at all times. Except for detached single-family development, gravel shall not be used to satisfy the requirements of this section. When gravel is used, a hard surfaced driveway apron must be installed to the greater of eight feet from the edge of pavement or past the ditch tile.
13.3.6 Maintenance. All off-street parking and loading areas shall be maintained in good repair, and in safe condition at all times, so as not to constitute a hazard to public safety or a visual or aesthetic nuisance to surrounding land. All off-street parking and loading areas shall be periodically re-striped or otherwise restored to maintain a clear identification of separate parking stalls.