Texas Government Code - GOV'T § 602.007. Filing of Oath Made by Certain Judicial Officers and Judicial Appointees

(1) an officer appointed by the supreme court, the court of criminal appeals, or the State Bar of Texas;

(2) an associate judge appointed under Subchapter B or C, Chapter 201, Family Code   1;  and

(3) a retired or former judge on the list maintained by the presiding judge of an administrative judicial region under Section 74.055.