Okla. Stat. tit. 43, § 14

Any minister of the Gospel, or other person authorized to solemnize the rites of matrimony within this state, who shall knowingly solemnize the rites of matrimony between persons prohibited by this chapter, from intermarrying shall be deemed guilty of a Class D1 felony offense, and upon conviction thereof shall be fined in any sum not exceeding Five Hundred Dollars ($500.00) and imprisonment as provided for in subsections B through F of Section 20N of Title 21 of the Oklahoma Statutes.