The Board shall give notice to all parties in an individual proceeding, prior to or at the hearing, of any facts of which it proposes to take official notice. Any party or his attorney may request that official notice be taken of any fact qualified for such notice by the Statutes of this State. If such official notice is taken, it shall be stated in the record, and all parties shall have opportunity to contest and give evidence in rebuttal or derogation of the official notice.
Okla. Admin. Code § 505:1-7-10