Mont. Code Ann. § 39-71-519

The department, the uninsured employer, the injured employee or the employee's beneficiaries, a third party who shares liability as defined in 39-71-412, or a fellow employee who shares liability as defined in 39-71-413 may enter into a settlement agreement to finally settle the rights and liabilities under 39-71-501, 39-71-503 through 39-71-511, and 39-71-515 through 39-71-520 of any or all of the parties. The settlement is subject to department approval in accordance with 39-71-741.