Mont. Code Ann. § 20-25-804

The authority conferred by 20-25-803 shall be exercised only pursuant to written agreement between an agency of this state having responsibility for or duties with respect to programs for assisting residents of this state to obtain higher education. Any such agreements shall include provisions for the payment of tuition and any other costs, and no such agreement shall be made which commits this state or any agency or officer thereof to any obligation for which funds have not been appropriated or otherwise made available in accordance with law.