Assistance provided to a project sponsor under subparagraph (A) may not exceed an amount equal to 75 percent of the total administrative costs incurred by the project sponsor in securing financial assistance under this section. (g) Limitation No project that receives financial assistance under this section may be financed (directly or indirectly), in whole or in part, with proceeds of any obligation the interest on which is exempt from the tax imposed under chapter 1 of the Internal Revenue Code of 1986. (h) Eligibility for assistance (1) Eligible projects The following projects may be carried out using assistance made available under this section: (A) A project for the reclamation and reuse of municipal, industrial, domestic, and agricultural wastewater, and naturally impaired ground water, which the Secretary, acting through the Commissioner of Reclamation, is authorized to undertake. (B) Any water infrastructure project not specifically authorized by law that— (i) the Secretary determines, through the completion of an appraisal investigation and feasibility study, would contribute to a safe, adequate water supply for domestic, agricultural, environmental, or municipal and industrial use