; and (2) by adding at the end the following: (D) A rule under subsection (a)(5) shall require the development of information by any person who manufactures or processes, or intends to manufacture or process, a chemical substance that is a perfluoroalkyl or polyfluoroalkyl substance. . (c) Perfluoroalkyl and polyfluoroalkyl substances Section 4 of the Toxic Substances Control Act ( 15 U.S.C. 2603 ) is amended by adding at the end the following: (i) Perfluoroalkyl and polyfluoroalkyl substances (1) Testing requirement rule (A) Protocols and methodologies In determining the protocols and methodologies to be included pursuant to subsection (b)(1) in a rule under subsection (a)(5), the Administrator shall allow for protocols and methodologies that test chemical substances that are perfluoroalkyl and polyfluoroalkyl substances as a class. (B) Period In determining the period to be included pursuant to subsection (b)(1) in a rule under subsection (a)(5), the Administrator shall ensure that the period is as short as possible while allowing for completion of the required testing. (2) Exemptions In carrying out subsection (c) with respect to a chemical substance that is a perfluoroalkyl or polyfluoroalkyl substance, the Administrator— (A) may only determine under subsection (c)(2) that information would be duplicative if the chemical substance with respect to which the application for exemption is submitted is in the same category, as established under subsection (a)(5)(B)(i), as a chemical substance for which information has been submitted to the Administrator in accordance with a rule, order, or consent agreement under subsection (a) or for which information is being developed pursuant to such a rule, order, or consent agreement