Ariz. Rev. Code of 1928, § 3467 et seq. Such districts, as political subdivisions of the State, could issue bonds exempt from federal income tax. Nevertheless, many Association members opposed creating a special district for *359 the project, in part because the state statute would have required that voting power in elections for directors of the district be distributed per capita among landowners, and not according to the acreage formula for stock assessments and water rights. In 1936, in response to a request from the Association, the state legislature amended the 1922 statute. Under the new statutory scheme, which is essentially the one at issue in this case, the legislature allowed the district to limit voting for its directors to voters, otherwise regularly qualified under state law, whoown land within the district, and to apportion voting power among those landowners according to the number of acres owned. Ariz. Rev. Stat. Ann. §§ 45-909, 45-983 (Supp. 1980-1981).[2] The Salt River Project Agricultural Improvement and Power District was then formed in 1937, its boundaries essentially the same as the Association's. Under the 1937 agreement, the Association made the District its contracting agent, and transferred to the District all its property, and the Association in turn agreed to continue to operate and maintain the Salt River Project. Under the current agreement, the District itself manages the power and water storage work of the project, and the Association, as agent for the District, manages water delivery. As for financing, the statute now permits the special districts to *360 raise