((a)) ** In general** The Secretary, at the request of and in coordination with affected Indian Tribes, States (including subdivisions and departments of a State), or a public agency organized pursuant to State law, may provide technical or financial assistance for, participate in, and enter into agreements (including agreements with irrigation entities) for—
((1)) groundwater recharge projects;
((2)) aquifer storage and recovery projects; or
((3)) water source substitution for aquifer protection projects.
((b)) ** Limitation** Nothing in this section authorizes additional technical or financial assistance for, or participation in an agreement for, a surface water storage facility to be constructed or expanded.
((c)) ** Requirement** A construction project shall only be eligible for financial assistance under this section if the project meets the conditions for funding under .section 3202(a)(2)(C)(ii) of this title
((d)) ** Cost sharing** Cost sharing for a project funded under this section shall be in accordance with .section 3202(b) of this title
((e)) ** Environmental laws** In providing funding for a project under this section, the Secretary shall comply with all applicable environmental laws, including —
((1)) the National Environmental Policy Act of 1969 ( et seq.);
((2)) any obligations for fish, wildlife, or water quality protection in permits or licenses granted by a Federal agency or a State; and
((3)) any applicable Federal or State laws (including regulations).
((f)) ** Authorization by Congress for major project construction** A project with a total estimated cost of $500,000,000 or more shall only be eligible for construction funding under this section if the project is authorized for construction by an Act of Congress.