Okla. Stat. tit. 19, § 19-136: County clerk - Office hours - Sign

The county clerk in each county of this state shall keep their

offices open during the same hours as other county officers in such

county; but, so that the public may know when their needs at such

offices may be served, after the secular days and respective hours

thereof have been determined upon or agreed, the said officers shall

so notify the public by so noting in painting in the sign indicating

the location of their respective offices, whether upon, over, or

near the office door.