Okla. Admin. Code § 245:15-7-4
The biennial renewal fee for engineers or land surveyors who reach the age of 70 prior to the renewal date of their certificate of licensure will be waived. Renewal forms must be completed prior to the renewal date to qualify. Licensees who are continuing to practice their profession are required to fulfill continuing education requirements, even if the renewal fee is waived. If all requirements of this section are not completed properly, the certificate of licensure will be inactivated and reinstatement fees and penalties will apply to re-license. However, beginning January 1, 2021, all licensees shall be required to pay the regular renewal fee as long as the licensee chooses to maintain an active license. An individual may choose to retire their license at no cost and maintain a retired professional engineer or retired professional land surveyor status pursuant to the provisions of OAC 245:15-1-3. However, no privilege to offer or practice engineering or surveying shall exist without an active license.
Okla. Admin. Code § 245:15-7-4