In petroleum, downstream industry: products formed in the course of refining crude petroleum through distillation, cracking, solvent refining and chemical treatment coming out as primary stocks from the refinery such as, but not limited to: LPG, naptha, gasolines, solvent, kerosenes, aviation fuels, diesel oils, fuel oils, waxes and petrolatums, asphalt, bitumens, coke and refinery sludges, or such refinery petroleum fractions which have not undergone any process or treatment as to produce separate chemically-defined compounds in a pure or commercially pure state and to which various substances may have been added to render them suitable for particular uses: Provided, That the resultant product contains not less than fifty percent (50%) by weight of such petroleum products [Section 4(n), Downstream Oil Industry Deregulation Act of 1998; Section 3(ii), Downstream Oil Industry Deregulation Act of 1998 IRR]
