In Cherry v. Steiner, 543 F. Supp. 1270 (D. Ariz. 1982), the plaintiffs "argued that the classification of certain areas as AMA's is discriminatory." Id. at 1279. The federal district court, applying the rational basis test, reasoned that it is "well-documented, the existence of a sound hydrological basis for the boundaries which establish AMA's," and concluded that "the equal protection clause does not apply to the differing treatment accorded geographical areas." Id. at 1280.