Montana StatutesPart 45. Municipal Refunding Revenue Bonds Option 17-7-4501. Authority to issue refunding revenue bonds.7-7-4502. Interest rates on refunding revenue bonds.7-7-4503. Exchange or sale of refunding revenue bonds.7-7-4504. Deposit of proceeds of refunding revenue bonds in escrow.7-7-4505. Use of excess revenues and pledged reserves.