of a State may impose requirements described in paragraph (1) until such time as the requirements under this title (including amendments made by this title) take effect. (b) Savings provision Nothing in this title or an amendment made by this title prohibits a State or political subdivision of a State from imposing requirements that are more stringent than those imposed by this title (including regulations) or an amendment made by this title. II Other matters with respect to perfluoroalkyl or polyfluoroalkyl substances 201. Centers of Excellence for Assessing Perfluoroalkyl and Polyfluoroalkyl Substances in Water Sources and Perfluoroalkyl and Polyfluoroalkyl Substance Remediation Solutions (a) Purpose The purpose of this section is to dedicate resources to advancing, and expanding access to, perfluoroalkyl or polyfluoroalkyl substance detection and remediation science, research, and technologies through Centers of Excellence for Assessing Perfluoroalkyl and Polyfluoroalkyl Substances in Water Sources and Perfluoroalkyl and Polyfluoroalkyl Substance Remediation Solutions. (b) Definitions In this section: (1) Appropriate committees of congress The term appropriate committees of Congress means— (A) the congressional defense committees (as defined in section 101(a) of title 10, United States Code)