Okla. Admin. Code § 380:1-7-19
Upon the failure of any person to obey a subpoena, or upon the refusal of any witness to be sworn or make an affirmation or to answer a question put to him in the course of a hearing in any rule making proceeding, proceeding for a declaratory ruling, or in an individual proceeding, or in any other authorized action of the Labor Commissioner, the Labor Commissioner as soon as convenient shall consider the matter. The Labor Commissioner may direct the institution of appropriate judicial proceedings under the law of the State for an order to compel compliance with the subpoena or the giving of testimony, as the case may be. Meanwhile, the hearing or other matters shall proceed, so far as possible, but the Labor Commissioner at his discretion at any time may continue the proceedings for such time as may be necessary to secure a final ruling in the compliance proceedings.
Okla. Admin. Code § 380:1-7-19