(a) Each of the circuit judges of the Fifth Judicial Circuit of this state (as such circuit is now or hereafter constituted) shall be paid a local expense allowance, in addition to all compensation and expenses paid by the state, from the general funds of the counties composing such circuit, in the amount of ten thousand dollars ($10,000) per annum, which shall be paid in equal monthly installments. The proportion of the total annual local expense allowance hereby authorized for each such circuit judge, to be paid by each county in such circuit, shall be determined by multiplying ten thousand dollars ($10,000) times the quotient derived by dividing the total number of case filings in all circuit courts of such circuit (as such circuit is constituted at the time such payment is made) for the five calendar years beginning with 1980, through and including 1984, into the total number of case filings in the circuit court (and with respect to the circuit court of Tallapoosa County, both divisions of that circuit court) of that county for the five calendar years beginning with 1980, through and including 1984, as such case filings have been reported by the Administrative Office of Courts. The local expense allowance hereby authorized shall not be paid to any retired or supernumerary circuit judge.
(b) The governing bodies of the counties which compose the Fifth Judicial Circuit of this state (as such circuit is now or hereafter constituted) are authorized, at any time and from time to time, to increase the amount of local expense allowance provided for in subsection (a), provided the governing bodies of all of the counties which compose such circuit, approved by majority vote both the amount of any such increase in local expense allowance, and the proportion thereof to be paid by each such county.
(c) The governing bodies of the counties which compose the Fifth Judicial Circuit of this state (as such circuit is now or hereafter constituted) are authorized, at any time and from time to time, to rescind, in whole or in part, any increase in the amount of local expense allowance which may have been authorized by such governing bodies pursuant to subsection (b), provided the governing bodies of all of the counties which compose such circuit, approve by majority vote both the amount of any decrease in local allowance caused by any such rescission, and the proportion of the total local expense allowance to be paid by each such county to each circuit judge of such circuit after such rescission become effective, and provided further, such governing bodies shall not be authorized to rescind or otherwise decrease, at any time or in whole or in part, the amount of local expense allowance authorized and required to be paid to each circuit judge of such circuit pursuant to subsection (a).