Said tax anticipation warrants shall be delivered to the payee or payees for the purposes enumerated herein, by an order of the board, in total or in part as necessary, and an appropriate record thereof kept by the secretary and a duly certified copy thereof by him delivered to the treasurer, who shall pay without further order of the board, upon due endorsement and presentment by the record holder thereof or said holder’s legal transferee upon satisfactory proof being made to the treasurer thereof the said tax anticipation warrants and interest coupons as due, out of any maintenance fund of the district; provided, that in the event there is not sufficient funds to pay all or a part of such tax anticipation warrants and interest coupons upon presentment, and treasurer shall so note and said indebtedness shall bear interest at the rate of six percent per annum from time of such presentment and notation until paid.