; and (V) a review of options for restructuring; (ii) a demonstration of consistency with State, regional, and municipal watershed plans; (iii) a water conservation plan consistent with guidelines developed for such plans by the Administrator under section 1455(a); and (iv) a description of measures undertaken by the public water system to improve the efficiency of the public water system or reduce the public water system’s environmental impact, which may include— (I) water efficiency or conservation, including the rehabilitation or replacement of existing leaking pipes; (II) use of reclaimed water; (III) actions to increase energy efficiency; (IV) actions to generate or capture sustainable energy on site or through the transportation of water through the public water system; (V) actions to protect source water; (VI) actions to mitigate or prevent corrosion, including design, selection of materials, selection of coating, and cathodic protection; and (VII) actions to reduce disinfection byproducts. ; and (4) in subparagraph (D) (as redesignated by paragraph (2)) by striking periodically and inserting at least biennially . (b) Guidance Section 1452 of the Safe Drinking Water Act ( 42 U.S.C. 300j–12 ) is amended— (1) by redesignating subsection (r) as subsection (t)