Mont. Code § 77-3-430
Nothing contained in this or in prior related laws prevents the board from entering into agreements for the pooling of acreage with others for unit operations for the storage of carbon dioxide in a geologic storage reservoir or the production of oil or gas or both and the apportionment of oil or gas royalties or both on an acreage or other equitable basis and from modifying leases with respect to delay rentals, delay drilling penalties, and royalties in accordance with pooling agreements and unit plans of operation. However, agreements may not change the percentage of royalties paid to the state from the percentages fixed in its leases. The board may modify existing pooling and unit agreements to commit the state lands included in the pooling or unit agreements for as long as the unitized substance or substances for which the state lands are committed are produced from any lands in the unit.
§ 77-3-430, MCA