; and (ii) covered facilities that manufacture low-density polyethylene, linear low-density polyethylene, high-density polyethylene, styrene, vinyl chloride, or synthetic organic fibers use only zero-emissions energy sources, except to the extent that waste gases are recycled, unless the Administrator— (I) determines that under certain conditions (such as during the commencement or shut down of production at a covered facility), expenditures of energy that are not from zero-emissions energy sources are required; and (II) publishes the determination under subclause (I) and a proposed mixture of zero-emissions energy and non-zero-emissions energy for those conditions in a rulemaking. (B) New source performance standards for certain facilities Not later than 3 years after the date of enactment of this Act, the Administrator shall promulgate a final rule— (i) designating ethylene, propylene, polyethylene, and polypropylene production facilities as a category of stationary source under section 111(b)(1)(A) of the Clean Air Act ( 42 U.S.C. 7411(b)(1)(A) ); and (ii) establishing new source performance standards for the category of stationary source designated under clause (i) under section 111(f)(1) of the Clean Air Act ( 42 U.S.C. 7411(f)(1) ). (C) Storage vessels for covered products Not later than 3 years after the date of enactment of this Act, the Administrator shall promulgate a final rule modifying section 60.112b(a) of title 40, Code of Federal Regulations (as in effect on the date of enactment of this Act), to ensure that an owner or operator of a storage vessel containing liquid with a vapor pressure of equal to or more than 5 millimeters of mercury under actual storage conditions that is regulated under that section uses— (i) an internal floating roof tank connected to a volatile organic compound control device