Miss. Code Ann. § 31-7-49: Miss. Code Ann. § 31-7-49

In placing orders for purchases under bids received and contracts awarded under the provisions of this chapter, the governing authority, by orders entered on its minutes, may authorize its members, or agents designated by its order, to place orders for the purchase of such supplies and materials from time to time during the period covered by the contract, as such supplies and materials are needed. Claims for such supplies so ordered by an individual board member or other duly authorized agent shall not be allowed and paid by the board until such claims shall have been approved in writing by the individual board member or agent who ordered such supplies or the successor to such member or agent.