Good cause is defined as a situation beyond the control of the parties. Situations considered beyond the control of a party may include, among other factors, a disabling personal illness, death in immediate family, jury duty, or military obligations. Good cause will not be found if the failure to act is due to the negligence or inattentiveness of the party or the party's representative or attorney-at-law.
Okla. Admin. Code § 240:10-13-37