With the approval of the Department of Food and Agriculture and the State Public Works Board, the amount paid into the Fair and Exposition Fund pursuant to Section 25902 shall be available for expenditure by the county for permanent improvements for fair purposes on the property of the county, the purchase of equipment for fair purposes, or the acquisition or purchase of real property, including costs of appraisal or other incidental costs, to be used as sites for those permanent improvements. Any portion of those funds that is not so expended within three years after being paid into the State Treasury shall be added to and become a part of the amount available under law for permanent improvements on the property of the state, citrus, county, or district agricultural associations for fair purposes, or the

purchase of equipment for fair purposes, or the acquisition or purchase of real property and appraisal or other incidental costs, to be used as sites for those permanent improvements, in those amounts as are allocated by executive order of the Secretary of Food and Agriculture.