Effective beginning the next term of office of the Sheriff of Morgan County after the ratification of this amendment, the sheriff shall receive an annual salary equal to five thousand dollars ($5,000) less than the annual salary of the chair of the Morgan County Commission. After that date, any allowances or other amounts received by the sheriff for feeding prisoners shall be deposited in a separate account in the county treasury and used by the sheriff only for the feeding of prisoners in the county jail. The sheriff shall account for any shortfall of funds in the food account using any discretionary or appropriated funds of the office. The sheriff shall not be subject to the competitive bid law for the purchase of food or supplies used for feeding prisoners in the county jail.