A parking facility owner may designate one or more spaces as restricted parking spaces on a portion of an otherwise unrestricted parking facility. Instead of installing a sign at each entrance to the parking facility as provided by Section 2308.301(a)(2), an owner may place a sign that prohibits unauthorized vehicles from parking in designated spaces and that otherwise complies with Sections 2308.301 and 2308.302:
(1) at the right or left side of each entrance to a designated area or group of parking spaces located on the restricted portion of the parking facility; or
(2) at the end of a restricted parking space so that the sign, the top of which must not be higher than seven feet above the ground, is in front of a vehicle that is parked in the space and the rear of which is at the entrance of the space.