Okla. Stat. tit. 59, § 59-1850.7: License required - Contractor required for mechanical

work.

No person shall engage or offer to engage in, by advertisement

or otherwise, any mechanical work as a journeyman or contractor who

does not possess a valid and appropriate license from the

Construction Industries Board. No business entity shall act as a

mechanical firm unless a contractor is associated with and

responsible for all mechanical work of such entity.