A. Within twenty (20) days of the date a final order was sent to the parties the Workers' Compensation Court's power to correct it nunc pro tunc is coextensive with that of the district court. After the lapse of twenty (20) days that power is limited only to correcting facially apparent clerical errors or omissions, mathematical miscalculations, and other facially apparent mistakes in recording judicial acts.

B. No nunc pro tunc change may be made in any order without a written application therefor made by the filing of a form Nunc Pro Tunc Request, followed by an adversary hearing set upon notice to the opposite parties or a written consent by those parties. A nunc pro tunc correction order made within twenty (20) days of a final order's entry must be entered and sent to the parties within those twenty (20) days. See, Ferguson v. Ferguson Motor Co., 1988 OK 137, 766 P.2d 335.