Bonds issued by any irrigation district, and the interest thereon, and contracts not payable in bonds, made and entered into by the district for the acquisition of irrigation works already constructed, or for the establishment and construction of irrigation works, or any part thereof, must be paid from the revenue obtained from special assessments upon the real property of the district or from any other revenue available for that purpose obtained from charges to water users or from the sale of water to any person, firm, corporation, limited liability company, municipality, or other irrigation district, or by a combination of special assessments and water charges.
N.D.C.C. § 61-08-25