Okla. Stat. tit. 19, § 455

A. The board of county commissioners of each county is hereby authorized to offer and pay a reward, from county funds, in an amount not to exceed One Thousand Dollars ($1,000.00) for the arrest and conviction, or for evidence leading to the arrest and conviction of any person stealing or defacing county road signs or any other county property. B. The board of county commissioners may create and maintain a reward fund of not to exceed Two Thousand Dollars ($2,000.00) from which to pay the rewards provided for in subsection A of this section. C. Any person convicted under subsection A of this section may in lieu of the fine be required to deposit like amount into the county reward fund.