Montana Code 19-7-601. Disability retirement benefit
19-7-601. Disability retirement benefit. (1) Except as provided in subsection (2), a vested member who becomes disabled must be granted a disability retirement benefit that is the actuarial equivalent of the service retirement benefit under 19-7-503 standing to the member’s credit at the time of the member’s disability retirement.
(2)A vested or nonvested member who becomes disabled as a direct result of the member’s service in the line of duty:
(a)before completing 20 years of membership service must receive a disability retirement benefit equal to one-half the member’s highest average compensation; or
(b)after completing 20 years or more of membership service must receive a disability retirement benefit equal to 2.5% of the member’s highest average compensation for each year of service credit.