(a) Except as provided in paragraph (b) or (c), no disability benefit is payable from the statewide retirement plan.
(b) If the board approves the arrangement, disability coverage for the lump-sum retirement division of the statewide retirement plan members may be provided through a group disability insurance policy obtained from an insurance company licensed to do business in this state. The lump-sum retirement account of the voluntary statewide volunteer firefighter retirement plan is authorized to pay the premium for the disability insurance authorized by this paragraph. The proportional amount of the total annual disability insurance premium must be added to the required contribution amount determined under section 353G.08.
(c) The disability benefit coverage for the monthly benefit retirement division is the disability service pension amount specified in the retirement benefit plan document applicable to the fire department, applicable former volunteer firefighter relief association in effect as of the last day before the date on which retirement coverage transferred to the voluntary statewide volunteer firefighter retirement plan, subject to all conditions and limitations in the disability service pension specified therein.