Okla. Stat. tit. 19, § 19-637: When additional security required of treasurer

The county commissioners may require the county treasurer to

give additional securities whenever in the opinion of a majority of

said county commissioners, the existing security shall have become

insufficient and said commissioners are hereby also authorized and

empowered to demand and receive from said county treasurer an

additional bond as required by law, with good and sufficient

security in such sum as said commissioners or a majority of them may

direct whenever in their opinion more money shall have passed or is

about to pass into the hands of said treasurer than is or would be

recovered by the penalty on the previous bond.