Okla. Stat. tit. 68 § 1371
Any sales tax levied by a county pursuant to the provisions of Section 1370 of this title shall be paid by the consumer to the vendor. The board of county commissioners and the Oklahoma Tax Commission shall enter into a contract whereby the Tax Commission shall have authority to assess, collect, and enforce the sales tax, and any penalties or interest thereon, levied by such county, and to remit the same to the county. Such assessment, collection, and enforcement authority shall apply to any sales tax, and any penalty or interest liability existing at the time of contracting. Upon contracting, the Tax Commission shall have the power of enforcement of the sales tax, and any penalties or interest that are vested in the county. The contract shall provide for the assessment, collection, and enforcement of the sales tax, and the penalties or interest, in the same manner as the administration, collection, and enforcement of the state sales tax by the Tax Commission. For providing such collection assistance, the Tax Commission shall charge the county a fee of one-half of one percent (0.5%) of the gross collection proceeds.
The Tax Commission shall place all sales taxes, including penalties and interest, collected on behalf of a county pursuant to the provisions of this section in the Sales Tax Remitting Account as provided in Section 1373 of this title. As used in this section and Sections 1372, 1373 and 1374 of this title, "sales tax" includes any tax imposed pursuant to the provisions of Section 1370.9 of this title.
Okla. Stat. tit. 68, § 1371