Mont. Code Ann. § 2-8-121

Unless otherwise provided, upon termination, each agency, program, or unit shall continue in existence until July 1 of the next succeeding year for the purpose of winding up its affairs. During the windup period, termination does not reduce or otherwise limit the powers or authority of each respective agency or program except that no action may be taken which would continue in effect beyond the 1-year windup period. Upon the expiration of the 1 year after termination, each agency or program not modified or reestablished shall be abolished and all unexpended balances of appropriations, allocations, or other funds shall revert to the fund from which they were appropriated or, if that fund is abolished, to the general fund.