(a) The commissioner of natural resources may designate any lands belonging to the state and the beds of any waters belonging to the state or any lands in which the state has an interest as mining units and may rearrange or modify the mining units from time to time, subject to the limitations of this section.
(b) No mining unit shall contain lands belonging to more than one permanent trust fund, except mining units leased under section 93.25.
(c) Lands which have been sold by the state and are in use as part of the site of a plant for the production of taconite concentrates shall not be designated as mining units.
The commissioner shall prepare and keep on file in the Office of the Division of Lands and Minerals of the Department of Natural Resources and at such other places as the commissioner may direct a list of the mining units designated under this section, giving the descriptions of the mining units and such other information as the commissioner deems necessary. In case the commissioner shall prescribe special conditions to be included in a lease for any mining unit as authorized by law, a statement of the conditions shall be included with the designation of the unit in the list.
Except as otherwise expressly provided by law, each mining lease shall cover only one entire mining unit designated under this section.