; and (3) a partnership that is voluntary and not mandatory has the capacity to help a community water system that is distressed to deliver quality and affordable water services by providing those community water systems technical, operational, and financial support. 3. Voluntary water partnerships (a) In general Section 1420 of the Safe Drinking Water Act ( 42 U.S.C. 300g–9 ) is amended— (1) in subsection (b), by adding at the end the following: (4) Notice, assessment, and enforcement (A) Notice Not later than 1 year after the date of enactment of this paragraph, each State that has primary enforcement responsibility under section 1413 (or the Administrator, in the case of a State that does not have primary enforcement responsibility) shall provide written notice to each community water system listed under paragraph (1) in the State that has not returned to compliance that the community water system is so listed. (B) Intent to enter partnership Not later than 180 days after the date on which a community water system receives a notice under subparagraph (A), the community water system may submit to the State or the Administrator, as applicable, a letter of intent to enter into a partnership (as defined in subsection (d)(3)(A)). (C) Enforcement (i) No enforcement action (I) In general Except as provided in clause (ii), no person (including the Administrator or a State) may, during the time period described in subclause (II), take or pursue any civil or administrative enforcement action under this title (including any civil action under section 1449) against a community water system that receives a notice under subparagraph (A) so long as the community water system is actively and in good faith working to enter into a partnership (as defined in subsection (d)(3)(A)) (as determined by the State or the Administrator, as applicable). (II) Period described The period referred to in subclause (I) is the period that— (aa) begins on the date on which the community water system submits a letter of intent under subparagraph