Any property used for parking or storage of motor vehicles, where not prohibited as aforesaid, is to be enclosed with a six-foot cedar fence (or such type of fence as may be approved by the Planning Board) on two sides, with an approved fence or wall at front setback line or at any other point as may be approved by the Planning Board of the Borough pursuant to Section 16-12, to the end that all area utilized for parking or storage is completely enclosed within a compound composed of fence and building. It is the purpose of this prohibition to have no vehicles stored or parked in an area exposed to view from any street, except as specifically permitted herein.