; and (2) in the undesignated matter following paragraph (3), in the second sentence, by striking 35 percent of such costs and inserting 25 percent of such costs . (b) Application The amendments made by subsection (a) shall apply beginning on October 1, 2024, to any construction of a project for navigation on the inland waterways that is new or ongoing on or after that date. (c) Exception In the case of an inland waterways project that receives funds under the heading construction under the heading Corps of Engineers—Civil under the heading Department of the Army in title III of division J of the Infrastructure Investment and Jobs Act (135 Stat. 1359) that will not complete construction, replacement, rehabilitation, and expansion with such funds— (1) section 102(a) of the Water Resources Development Act of 1986 ( 33 U.S.C. 2212(a) ) shall not apply; and (2) any remaining costs shall be paid only from amounts appropriated from the general fund of the Treasury. 110. Leveraging Federal infrastructure for increased water supply Section 1118(i) of Water Resources Development Act of 2016 ( 43 U.S.C. 390b–2(i) ) is amended by striking paragraph (2) and inserting the following: (2) Contributed funds for other Federal reservoir projects (A) In general The Secretary is authorized to receive and expend funds from a non-Federal interest or a Federal agency that owns a Federal reservoir project described in subparagraph (B) to formulate, review, or revise operational documents pursuant to a proposal submitted in accordance with subsection (a). (B) Federal reservoir projects described A Federal reservoir project referred to in subparagraph (A) is a reservoir for which the Secretary is authorized to prescribe regulations for the use of storage allocated for flood control or navigation pursuant to section 7 of the Act of December 22, 1944 (commonly known as the Flood Control Act of 1944 ) (58 Stat. 890, chapter 665