Mont. Code Ann. § 15-30-2621 — Agreements With Contiguous States

15-30-2621 . Agreements with contiguous states. The department of revenue may, in its discretion, enter into reciprocal agreements with the taxing authorities of states contiguous to the state of Montana which tax the income of Montana residents earned in that state to provide that the tax imposed by this chapter on income derived by persons who are nonresidents of this state is not payable when such other state or states agree to grant similar treatment to residents of Montana.