; or (v) processes a perfluoroalkyl or polyfluoroalkyl substance. (B) Inclusions The term manufacturer includes importers and exporters of products that are known to contain perfluoroalkyl or polyfluoroalkyl substances. (C) Exclusion The term manufacturer does not include an entity that neither manufactures nor uses perfluoroalkyl or polyfluoroalkyl substances, but receives perfluoroalkyl or polyfluoroalkyl substances in the normal course of operations of the entity, including a solid waste management facility, a composting facility, a public water system (as defined in section 1401 of the Safe Drinking Water Act ( 42 U.S.C. 300f )), and a publicly or privately owned or operated treatment works (as defined in section 212 of the Federal Water Pollution Control Act ( 33 U.S.C. 1292 )). (5) National Academies The term National Academies means the National Academies of Sciences, Engineering, and Medicine. (6) Nonessential use The term nonessential use means a use of a perfluoroalkyl or polyfluoroalkyl substance that is not an essential use. (7) Perfluoroalkyl or polyfluoroalkyl substance The term perfluoroalkyl or polyfluoroalkyl substance means a substance that is a perfluoroalkyl substance or a polyfluoroalkyl substance (as those terms are defined in section 7331(2)(B) of the PFAS Act of 2019 ( 15 U.S.C. 8931(2)(B) )), including a mixture of those substances. (8) Process The term process , with respect to a perfluoroalkyl or polyfluoroalkyl substance, means the preparation of the perfluoroalkyl or polyfluoroalkyl substance, including preparation that includes the mixture of multiple perfluoroalkyl or polyfluoroalkyl substances, after the manufacture of that perfluoroalkyl or polyfluoroalkyl substance for distribution in commerce— (A) in the same form or physical state as, or in a different form or physical state from, that in which the perfluoroalkyl or polyfluoroalkyl substance was received by the person so preparing the perfluoroalkyl or polyfluoroalkyl substance