Class III materials or products may be stored, manufactured or utilized in manufacturing processes or other production only in conformity with the following limitations:
(a) Such storage or utilization shall be carried on only within buildings or other structures which are completely enclosed by incombustible exterior walls.
(b) Such buildings or other structures shall be set back at least fifty feet from any lot line or, in lieu thereof, shall be protected throughout by an automatic fire extinguishing system which shall comply with the requirements set forth in applicable State and local codes, and all storage tanks and similar structures shall be protected by a fire extinguishing system which shall comply with the requirements set forth in applicable State and local codes.
(c) The final manufactured product shall have a rating of Class I.
(d) The storage of Class III materials or products shall be limited to current Fire Prevention Code provisions.