; (2) by inserting after clause (i) the following: (ii) Construction authorization If the Secretary determines that the project described in subparagraph (A)(ii)(I) is feasible, the Secretary, in cooperation with the Authority, may participate in the design, planning, and construction of the Sites Project in a manner that is substantially in accordance with the recommended plan, subject to the conditions described in the feasibility study. (iii) Federal investment in a non-Federal sites project The Secretary shall take such steps as are necessary to ensure that, in return for any Federal investment in a non-Federal Sites Project, a proportionate share of the project’s public benefits are Federal benefits, including water supplies dedicated to specific purposes such as environmental enhancement and those purposes referred to in section 6(c) and 6(d) of the Sacramento Valley Water Storage and Restoration Act.