The department shall charge Chilton County for collecting the tax levied under this part in an amount or percentage of total collections as may be agreed upon by the commissioner and the Chilton County Commission. The charge shall not exceed five percent of the total amount of the tax collected in the county. The charge may be deducted each month from the gross revenues from the tax before certification of the amount of the proceeds due Chilton County for that month. The Commissioner of Revenue shall pay into the State Treasury all amounts collected under this part, as the tax is received by the department on or before the first day of each successive month. The commissioner shall certify to the State Comptroller the amount collected and paid into the State Treasury for the benefit of Chilton County during the month immediately preceding the certification. The State Comptroller shall issue a warrant each month payable to the County Treasurer of Chilton County in an amount equal to the certified amount which shall be paid into the county general fund to be used to build a new county jail. The tax shall expire within one year of certification by the Chilton County Commission that the county indebtedness has been retired from the bond issuance and that the debt no longer exists. The taxes collected one year after the indebtedness has been retired shall be placed in a trust account used for the maintenance and repair of the new jail as follows: For the fiscal year beginning October 1, 2019, an amount not to exceed four hundred thousand dollars ($400,000) may be appropriated by the county commission from the trust account, which amount may be carried over from year to year, for the maintenance and repair of the county jail; and for each fiscal year thereafter amounts not to exceed one hundred thousand dollars ($100,000) per year may be appropriated by the county commission from the trust account for the maintenance and repair of the county jail, until the funds in the account are exhausted. Upon certification, the tax levied pursuant to this part shall terminate and the tax shall automatically become null and void.