Okla. Stat. tit. 15, § 15-757: Investigations

A. When the Attorney General or a district attorney has reason

to believe a person has engaged in, is engaging in or is about to

engage in any practice declared to be unlawful by Section 753 of

this title, and he believes it to be in the public interest that an

investigation should be made to ascertain whether a person has in

fact engaged in, is engaging in or is about to engage in any such

practice, he may execute in writing and cause to be served upon any

such person who is believed to have information, documentary

material or physical evidence relevant to the alleged violation an

investigative demand requiring such person to furnish, under oath or

otherwise, a report in writing setting forth the nonprivileged

relevant facts and circumstances of which he has knowledge, or to

appear and testify, or to produce relevant nonprivileged documentary

material or physical evidence for examination at such reasonable

time and place as may be stated in the investigative demand,

concerning the advertisement, offering for sale, sale or

distribution of any subject of a consumer transaction or the conduct

of any trade or commerce that is the subject matter of the

investigation.

B. At any time before the return date specified in an

investigative demand, or within twenty (20) days after the demand

has been served, whichever period is shorter, a petition to extend

the return date, or to modify or to set aside the demand, stating

good cause, may be filed in the district court of the county where

the person served with the demand resides or has his principal place

of business, or in the district court of Oklahoma County, Oklahoma.

At any time, an extension of the return date or a modification or

setting aside of the demand may be made by agreement of the parties.