Okla. Admin. Code § 595:1-3-11
A request to withdraw from or cancel a scheduled hearing must be submitted in writing on a form prescribed by the Department. The form can be obtained from the Department at its principal place of business, 3600 North Martin Luther King Avenue, Oklahoma City, OK or at www.ok.gov/DPS. A request for withdrawal of a scheduled hearing must be received by the Department no later than 12:00 PM two (2) business days prior to the scheduled hearing. If the request is not received by the Department by 12:00 PM two (2) business days prior to the scheduled hearing the Department may proceed with the hearing and take action based on the evidence.
A request to withdraw from or cancel a scheduled hearing may only be submitted in person at the Department's principal place of business, or by mail to the address below. Any requests submitted other than in person or by mail will not be accepted and a hearing will not be granted. Request forms mailed via the U.S. Postal Service shall be addressed to the Department of Public Safety, Legal Division, P.O. Box 11415, Oklahoma City, OK 73136.
Okla. Admin. Code § 595:1-3-11