Not less than 10% of employee parking area, located as close as practical to the employee entrance(s), shall be reserved for use by potential carpool/vanpool vehicles, without displacing handicapped and customer parking needs. This preferential carpool/vanpool parking area shall be identified on the site plan upon application for a building permit. Spaces will be signed/striped as demand warrants; provided that at all times at least one space for projects of 50,000 square feet to 100,000 square feet and two spaces for projects over 100,000 square feet will be signed/striped for carpool/vanpool vehicles.