Montana StatutesPart 16. Postretirement Benefits and Benefit Increases19-3-1601. Repealed.19-3-1602. Repealed.19-3-1603. Repealed.19-3-1604. Repealed.19-3-1605. Guaranteed annual benefit adjustment.19-3-1606. Purchasing power adjustment.19-3-1607. Nonapplication of part to defined contribution plan.