State agencies and public school systems are hereby authorized to enter into contracts of three years or less duration with private and nonprofit organizations for the purpose of managing recyclable materials, subject to the approval of the surplus property division of the Alabama Department of Economic and Community Affairs. Recyclable materials produced by state agencies and public school systems may be sold to public purchasers or may be donated to nonprofit organizations as long as the materials are substantially recycled. Sales and donations of recyclable materials shall be conducted through or approved by the surplus property division of the Alabama Department of Economic and Community Affairs in accordance with rules and regulations to be adopted by the Alabama Department of Economic and Community Affairs governing the sale or donation of recyclable materials.