Every deaf or hard-of-hearing person whose appearance in any proceeding entitles that person to a qualified legal interpreter shall make a good faith effort to notify the appointing authority of the desire of the person for an interpreter. An appointing authority may require a person requesting the appointment of an interpreter to furnish reasonable proof of hearing loss when the appointing authority has reason to believe that the person does not have a hearing loss.
Okla. Stat. tit. 63, § 2412