19-9-903. Amount of disability retirement benefit -- continuation of benefit after death of member. (1) A member who becomes disabled:

(a) before completing 20 years of membership service must receive a disability retirement benefit equal to one-half the member's final 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 final average compensation for each year of service credit.

(2) Upon the death of a member receiving a disability retirement benefit under this section, the member's surviving spouse or dependent child is eligible for benefits as provided in 19-9-804.