; or (2) the Secretary— (A) has expended all of the available funding provided pursuant to section 14(a)(1)(D) to rehabilitate the St. Mary Canal and enlarge the Dodson South Canal; and (B) despite diligent efforts, could not complete the activities described in subsection (a). (d) Nonreimbursability of costs The costs to the Secretary of carrying out this section shall be nonreimbursable. 9. Fort Belknap Indian Irrigation Project System (a) In general Subject to the availability of appropriations, the Secretary shall rehabilitate, modernize, and expand the Fort Belknap Indian Irrigation Project, as generally described in the document of Natural Resources Consulting Engineers, Inc., entitled Fort Belknap Indian Community Comprehensive Water Development Plan and dated February 2019, which shall include— (1) planning, studies, and designing of the existing and expanded Milk River unit, including the irrigation system, Pumping Plant, delivery pipe and canal, Fort Belknap Dam and Reservoir, and Peoples Creek Flood Protection Project; (2) the rehabilitation, modernization, and construction of the existing Milk River unit