(1)  The contribution required to be made by a local council for a financial year (in this section referred to as " the contribution year " ) in respect of each category of land in its municipal area is an amount calculated in accordance with the following formula:

where –

a is the amount of the contribution; and

b is the total leviable value of all land of that particular category within the local council's municipal area for the contribution year and the 5 financial years immediately preceding the contribution year; and

c is the total leviable value of all land of that particular category in the State for the contribution year and the 5 financial years immediately preceding the contribution year; and

d is the total estimated operating expenses and capital costs, as approved by the Minister, of brigades within that particular category of land in the State, less –

(a) such portion of the prescribed amount under section 79(3) as relates to the same category of land; and

(b) the sum of all the minimum fire service contributions that the Commission estimates will be payable in respect of the contribution year in the State as regards the same category of land; and

e is the sum of all the minimum fire service contributions that the Commission estimates will be payable for the contribution year in the council's municipal area as regards that particular category of land.

(2)  In this section –

category , of land, means its category according to whether it is –

(a) permanent brigade rating district land; or

(b) composite brigade rating district land; or

(c) volunteer brigade rating district land; or

(d) general land;

leviable value , of land, means its net assessed annual value (being net assessed annual value greater than minimum assessed annual value), adjusted by the Commission pursuant to section 80(3) .