Okla. Admin. Code § 340:2-5-99
An administrative hearing officer (AHO) does not have the authority to issue subpoenas for the presence of witnesses or production of evidence at hearings.
(1) An AHO, at the request of a resource family, authorized representative, or on his or her own motion, may require the presence or production at a hearing of:
(2) A resource family's request for the presence of a DHS employee, DHS records, or other evidence, is granted by the AHO only if the resource family shows that the presence of the DHS employee or evidence is:
Added at 19 Ok Reg 2199, eff 6-27-02