The application of a person who fails to apply for, sit for, and successfully pass the National Counselor Examination and the Oklahoma Legal and Ethical Responsibilities Examination, within the two-year eligibility period, after the applicant has been mailed notification at last known address in writing of his/her eligibility for examination, shall be voided and the applicant shall be mailed notification at last known address.
Okla. Admin. Code § 310:405-15-8