Transition requirements. There shall be established, along the line of any side or rear lot that is contiguous to any residential district, unless the side or rear lot line coincides with any major street as shown on the adopted Master Plan of the Township of Parsippany-Troy Hills, a buffer area at least 15 feet in width, plus five feet of additional width for each ten-foot interval or fraction thereof of the height of the principal building which exceeds 15 feet in height. The buffer area shall be landscaped, and fencing shall be provided as required to provide appropriate screening of the operations of the lot from adjoining residential districts.