Okla. Stat. tit. 82, § 82-277.15: Payment of claims against district

No claims for goods or services shall be paid by the district

until the claims have been allowed by the board. The claims shall

be paid only upon warrants signed by the manager and countersigned

by the secretary-treasurer. The warrants shall state the date

authorized by the board and for what purpose. No warrant shall be

issued or obligation incurred unless the district has sufficient

funds on hand to pay such warrant when it is presented for payment.

The district shall keep records of each warrant as issued and as

presented for payment, showing the date and amount of such warrant,

to whom payable, the date of the presentation for payment, and the

date of payment. All warrants shall be drawn payable to the

claimant or bearer.