Citation. 702 P.2d 948 (Mont. 1985)
Facts. Walter Pettibone held water rights appurtenant to certain Montana state school trust lands. A dispute arose over whether those water rights could be severed from the trust land or otherwise transferred, used off-tract, or subjected to state regulatory regimes that would diminish the value of the trust lands themselves. The Department of State Lands sued to determine the proper allocation of water rights and the scope of permissible regulation affecting the trust corpus.
Holding. The Montana Supreme Court held that an interest in school trust land — including appurtenant water — cannot be alienated unless the trust receives adequate compensation, and that any law or policy infringing on the state’s managerial prerogatives over the school lands cannot be tolerated if it reduces the value of the land. Pettibone, 702 P.2d at 948, 954. The Court further held that “[s]chool trust lands are subject to [a] different set of rules than other public lands,” id. at 949, and that “[t]he essence of finding that property is held in trust, school, public, or otherwise, is that anyone who acquires interest in property does so subject to [the] trust.” Id. at 953.
Why it matters. Pettibone is one of the most-cited modern state-court statements of the strict-trust theory, and it is doctrinally important on three fronts. First, it confirms that the trust attaches not only to the land but to every appurtenance — water rights, mineral interests, access rights — none of which may be severed without full compensation. Second, it forecloses the argument that school trust lands may be regulated as “ordinary public lands”; the Montana court held in unambiguous terms that they are subject to a different set of rules. Third, Pettibone contains the canonical synthesis of Trustees of Vincennes University v. Indiana and Andrus v. Utah, articulating the three principles attributed to Vincennes — that the enabling acts created private-charitable-trust analogues that the state could not abridge, that they are to be strictly construed under fiduciary principles, and that they preempt conflicting state law. The case has become the standard reference for state high courts elaborating the strict-trust theory.
Cited in. Montana, Idaho, Utah, Washington, South Dakota, Wyoming, and Nebraska trust-lands jurisprudence; frequently cited as the leading articulation of the rule that trust-land management is a separate doctrinal category from general public-lands management.
Limits of this annotation. This entry is a scholarly summary, not a Shepardized citation analysis, and is not a substitute for current legal research. Readers should verify the case’s continuing validity in their jurisdiction before relying on it in litigation. Last updated: 2026-05-18.
