Mont. Code Ann. § 7-10-202

A regional resource authority acting pursuant to this part is not required to obtain any certificate of convenience or necessity, franchise, license, permit, or other authorization from any bureau, board, commission, or other instrumentality of the state in order to acquire, construct, purchase, reconstruct, improve, better, extend, maintain, and operate a project. The supervisory powers and duties of the department of environmental quality apply to projects under this part, and the functions of the department of natural resources and conservation and the water court apply to water rights associated with projects.