IDAHO CODE ANN. § 67-2327. Definitions
“Public agency” means any city or political subdivision of this state, including, but not limited to counties; school districts; highway districts; and port authorities; instrumentalities of counties, cities or any political subdivision created under the laws of the state of Idaho; any agency of the state government; and any city or political subdivision of another state.
“State” means a state of the United States and the District of Columbia.
IDAHO CODE ANN. §67-2328. Joint Exercise of Powers.
(a) Any power, privilege or authority, authorized by the Idaho Constitution, statute or charter, held by the state of Idaho or a public agency of said state, may be exercised and enjoyed jointly with the state of Idaho or any other public agency of this state having the same powers, privilege or authority; but never beyond the limitation of such powers, privileges or authority; and the state or public agency of the state, may exercise such powers, privileges and authority jointly with the United States, any other state, or public agency of any of them, to the extent that the laws of the United States or sister state, grant similar powers, privileges or authority, to the United States and its public agencies, or to the sister state and its public agencies; and provided the laws of the United States or a sister state allow such exercise of joint power, privilege or authority. The state or any public agency thereof when acting jointly with another public agency of this state may exercise and enjoy the power, privilege and authority conferred by this act; but nothing in this act shall be construed to extend the jurisdiction, power, privilege or authority of the state or public agency thereof, beyond the power, privilege or authority said state or public agency might have if acting alone.
(b) Any state or public agency may enter into agreements with one another for joint or cooperative action which includes, but is not limited to, joint use, ownership and/or operation agreements pursuant to the provisions of this act. Appropriate action by ordinance, resolution, or otherwise pursuant to law of the governing bodies of these participating public agencies shall be necessary before any such agreement may enter into force.
Link to full statute can be found here: www.legislature.idaho.gov/idstat/Title67/T67CH23SECT67-2328.htm