Mont. Code § 76-15-317
Agencies of this state which shall have jurisdiction over or be charged with the administration of any state-owned lands and of any county or other governmental subdivision of the state, which shall have jurisdiction over or be charged with the administration of any county-owned or other publicly owned lands lying within the boundaries of any district organized hereunder shall cooperate to the fullest extent with the supervisors of such districts in the effectuation of programs and operations undertaken by the supervisors under the provisions of this chapter. The supervisors of such districts shall be given free access to enter and perform work upon such publicly owned lands. The provisions of land use regulations adopted pursuant to 76-15-701 through 76-15-707 shall have the force and effect of law over all such publicly owned lands and shall be in all respects observed by the agencies administering such lands.
§ 76-15-317, MCA