Effective beginning the first day of the next month after the ratification of this amendment, any allowances or other amounts received by the Sheriff of Etowah County for feeding prisoners shall be deposited in a separate account in the county treasury to be known as the "Sheriff's Discretionary Fund." The Sheriff's Discretionary Fund shall be used by the sheriff for the feeding of prisoners in the county jail and as provided herein. Any funds in the Sheriff's Discretionary Fund over the amounts needed for the purposes provided above may be used by the sheriff for law enforcement purposes, for school resource officers, and for the operation of the office of the sheriff. Any funds in the Sheriff's Discretionary Fund at the end of any fiscal year shall be carried over from year to year. In the event additional amounts are needed by the sheriff for the feeding of prisoners, the amounts shall be paid by the sheriff from any other funds appropriated or otherwise available for the operation of the office of the sheriff the expenditure of which is not otherwise restricted by law. 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.