Okla. Stat. tit. 68 § 1702
To the end that the State of Oklahoma and the political subdivisions thereof may receive all taxes due in every instance, nonresident contractors desiring to engage in, prosecute, follow, or carry on the business of contracting shall give written notice by certified mail, with return receipt requested, to the Oklahoma Tax Commission, the Oklahoma Employment Security Commission, the Workers' Compensation Court, and the county assessor of each county in which such contract work or service is to be performed before actually commencing work or undertaking to perform any duties pursuant to any such contract. The notice shall state the approximate amount of the contract price, the location where work is to be performed, the approximate date work is to be commenced, a description of the general nature of the work to be performed and a complete list of all subcontractors, if any, including their addresses, and the amount of each such subcontract. The prime contractor shall also notify the above if they have a subcontract let after the work begins, so that the name of every subcontractor shall be known to the above before said subcontractor initiates his work.
Okla. Stat. tit. 68, § 1702