Colo. Rev. Stat. § 36-1-115
The state board of land commissioners is authorized to join on behalf of the state in a cooperative or unit plan of development or operation for any oil, gas, or geothermal resource pool, field, or area, or for any part of any such pool, field, or area, with the United States government and its lessees or with others or with both such parties and, for that purpose, is authorized at or after the time of joining to modify and change any and all terms of the leases issued under the provisions of articles 1 to 7 of this title as mutually agreed by the lessor and lessee in any such lease, including the extension of the term of years otherwise applicable to any such lease for the full period of time such cooperative or unit plan may remain in effect, as required to conform with the terms of any such lease to such cooperative or unit plan and to facilitate the efficient and economic production of the oil, gas, or geothermal resource from the lands so affected. Any such cooperative or unit plan, including lands owned by the state, may, in the discretion of the state board of land commissioners, contain a provision whereby authority is vested in the secretary of the interior if lands of the United States are also included or in any such person, committee, or state or federal officer or agency as may be designated in the plan to alter or modify from time to time the rate of prospecting and development and the quantity and rate of production under such plan.
C.R.S. § 36-1-115
For leasing and development of school district lands for oil and gas, see §22-32-112 .