Okla. Stat. tit. 40 § 199.1
It shall be unlawful for any person, partnership, agency, firm or corporation, labor organization or officer or agent thereof, to knowingly recruit, procure, supply or refer any person (excluding persons who are permanent employees of the employer involved in such strike or lockout) who has customarily and repeatedly offered himself for employment in the place of employees involved in strikes or lockouts for employment in place of an employee in a business or industry where a strike or lockout exists.
The provisions of this act shall not apply to services or work performed by a salaried or supervisory employee of a business or industry where a strike or lockout exists, or a person, firm or corporation in his or its usual trade, occupation or business; provided that such trade, occupation or business is not usually the furnishing of strikebreakers in any labor strike or lockout; and provided further, that the said person, firm, or corporation hiring, recruiting, securing or offering to secure employment shall, if a person or an unincorporated firm, be a bona fide resident of the State of Oklahoma for a period of six (6) months prior to the strike or lockout, or if a corporation, be chartered or duly licensed to do business in the State of Oklahoma for a period of six (6) months prior to the strike or lockout.
Okla. Stat. tit. 40, § 199.1