; and (B) for the class of perfluoroalkyl and polyfluoroalkyl substances described in paragraph (2) for which the Administrator has not established a health advisory under subsection (b)(1)(F) or a toxicity value, not later than 4 years after the date of enactment of this subsection. (2) Perfluoroalkyl and polyfluoroalkyl substance described A perfluoroalkyl and polyfluoroalkyl substance referred to in paragraph (1) is a perfluoroalkyl or polyfluoroalkyl substance for which the Administrator has validated a method to measure the level of that substance in drinking water. (3) Requirement An interim national primary drinking water regulation promulgated pursuant to paragraph (1) shall be— (A) protective of the health of vulnerable populations, including pregnant women, infants, and children; and (B) shall be as stringent as feasible (as defined in subsection (b)(4)(D)). . 310. Multi-benefit projects to improve watershed health (a) In general Not later than 1 year after the date of enactment of this Act, the Secretary of the Interior, in consultation with the heads of relevant agencies, shall establish a competitive grant program for habitat restoration projects that accomplish one or more of the following: (1) Improve watershed health. (2) Mitigate against the impacts of climate change. (3) Benefit ecosystems. (4) Protect against endemic species. (5) Restore aspects of the natural ecosystem. (6) Enhance commercial and recreational fishing. (b) Requirements (1) In general In awarding a grant under subsection (a), the Secretary— (A) shall give priority to a project that achieves more than 1 of the benefits described in that subsection