Okla. Const. art. VII-B, § 5

Each Judicial Officer elected before or after the adoption of this Article shall, unless removed for cause, serve out the term for which he is elected and those Judicial Officers serving at the date of the adoption of this Article, whose Judicial Office comes under the provision of this Article on the date of the expiration of said term, shall be deemed to have been appointed as provided herein and eligible to file a declaration of candidacy to succeed themselves as provided in this Article. If retained in office, the term of each such Judicial Officer shall be six (6) years commencing the second Monday in January following such election.

The term and election of each Judicial Officer appointed to fill a vacancy after the adoption of this Article shall be as follows: If such appointed officer has served or will have served twelve (12) months on or before the next general election following appointment, such officer may file for election for the remainder of the term for which such officer was appointed, or for a six (6) year term, whichever is applicable, within the time and in the manner elected Judicial Officers file their candidacy under this Article. If such appointed officer has not served or will not have served twelve (12) months on or before the next general election following appointment, such officer shall continue in office until the second general election following appointment and may file for selection for the remainder of the term or for a six (6) year term, whichever is applicable, as herein provided.