In addition to the regulations of subsection 37-4.3, any applicant for site plan approval for a nonresidential use upon land which either abuts a residential zone or residential use lawfully existing thereon, shall install an eight (8) foot high board-on board fence on said nonresidential property for the entire length of the property line between the nonresidential property and said residential zone or use. The requirements of this subsection are in addition to, and are not to be interpreted as a substitute for, any buffer area that may be required by this chapter.

No such fence shall be required when a street, rail or utility right-of-way separates the residential zone or residential-use and the proposed nonresidential use.

Any deviation from the requirements of this subsection shall require a design waiver from the appropriate board.