(a) Front Yards. The front yard setback shall be not less than fifty feet for parking areas and for a main or accessory building.
(b) Side and Rear Yards. The side and rear yards shall be not less than fifty feet for any main or accessory building. Planning Commission, however, may require greater yard dimensions or screening walls or landscaping where the proposed use adjoins a residential district. Active recreation areas shall be located not less than forty feet from a residential district lot line. Driveways and parking areas may be located within the side or rear yard but shall not be located less than ten feet from a residential district lot line.