(a) Each unit that has a volunteer fire department shall procure insurance in the name of and for the benefit of each member of the department. However, if a contract or agreement exists between a unit and a volunteer fire department, the contract or agreement must provide for insurance of the volunteer firefighters and emergency medical services personnel in the department in the amounts and with the coverages required by this chapter. Unless the contract or agreement stipulates otherwise, all insurance coverage must be under a group plan, rather than in the name of each individual firefighter and member of the emergency medical services personnel. Either the unit or the volunteer fire department, according to the contractor agreement, may undertake procurement of required insurance, but in either case, the costs of coverage must be borne by the unit. If a volunteer fire department serves more than one (1) unit under a contract or agreement, each unit that the department serves shall pay the amount for the insurance coverage determined under the following formula: STEP ONE: For each census block or other area in a unit that is served by more than one (1) volunteer fire department, divide the population of the area by the number of volunteer fire departments serving the area, and round the quotient to the nearest one thousandth (.001).
STEP TWO: Add the quotients determined under STEP ONE for the unit.
STEP THREE: Determine the sum of the STEP TWO amounts for all of the units served by the same volunteer fire department.
STEP FOUR: Divide the STEP TWO amount for a unit by the STEP THREE amount and round the quotient to the nearest one thousandth (.001).
STEP FIVE: Multiply the costs of the insurance coverage for the volunteer fire department by the quotient determined under STEP FOUR, rounded to the nearest dollar.