Exchange of public lands; reservation of rights

As the legislature may provide, any of the public lands of the state, including lands held in trust for any purpose, may be exchanged for any publicly or privately held lands with the unanimous approval of the governor, the attorney general and the state auditor. Lands so acquired shall be subject to the trust, if any, to which the lands exchanged therefor were subject. The state shall reserve all mineral and water power rights in lands transferred by the state.