(a) Commencing on June 1, 1997, the members of the Perry County Board of Education shall be entitled to an additional expense allowance in the amount of two thousand four hundred dollars ($2,400) per annum, which shall be in addition to all other expense allowances, compensation, or salary provided by law. This expense allowance shall be payable in equal monthly installments from the public school fund of the county.
(b) Beginning with the expiration of the term of the incumbent members of the Perry County Board of Education, the annual salary for the members of the Perry County Board of Education shall be increased by two thousand four hundred dollars ($2,400) and an annual expense allowance of one thousand two hundred dollars ($1,200) shall be provided, payable in equal monthly installments from the public school funds of the county and at that time, subsection (a) shall become null and void.