All officials of this Commonwealth and any of its agencies or any political subdivisions and persons holding contracts with the State or any of its political subdivisions shall encourage and to the extent possible require the procurement and purchase of recycled oil products represented as substantially equivalent to products made from new oil in accordance with rules prescribed by the Federal Trade Commission under section 383(d)(1)(A) of the Energy Policy and Conservation Act, Public Law 94-163, whenever such products are available at prices competitive with those of new oil produced for the same purpose.
58 P.S. § 479