; and (2) phasing down the consumption of regulated substances in the United States through an allowance allocation and trading program in accordance with the schedule under subsection (b)(3) (subject to the same exceptions and other requirements as are applicable to the phase-down of production of regulated substances under this Act). (d) Exceptions (1) Feedstocks and process agents Except for the reporting requirements described in section 5(a), this Act does not apply to— (A) a regulated substance that is used and entirely consumed (except for trace quantities) in the manufacture of another chemical; or (B) a regulated substance that is used and not entirely consumed in the manufacture of another chemical, if the remaining amounts of the regulated substance are subsequently destroyed. (2) Essential uses (A) In general Not earlier than January 1, 2034, the Administrator may, after notice and opportunity for public comment, authorize the production or consumption of a regulated substance for a period of not more than 5 years in a quantity in excess of the quantities authorized under subsection (b)(1) for the exclusive use of the regulated substance in an application with respect to which the Administrator determines that— (i) no substitute will be available during the applicable period for that application, considering technological achievability, commercial demands, safety, and other relevant factors