An area designated as an enterprise zone shall remain in existence for ten years from the first day of the calendar year immediately following its designation as an enterprise zone. Municipal and county governments may enter into agreements with qualifying business or service enterprises in designated enterprise zones to provide for modification or termination of the tax and fee exemptions and abatements. Property tax incentives available to a qualified business or service enterprise in an enterprise zone shall remain in effect for the full ten-year period established by Code Section 36-88-8, regardless of the termination of the designation of the enterprise zone.