Rule 5 - JUDICIAL SERVICE BY SENIOR, RETIRED, AND FORMER JUDGES(a) The Presiding Judge shall maintain a list of qualified senior, retired, and former judges, and the area(s) of their expertise, who are eligible to sit by assignment in the Region.(b) Qualified senior, retired, and former judges may elect to serve as judicial officers and be eligible for assignment pursuant to the requirements of Chapters 74 and 75.Tex. 7th. Admin. Reg. R. 5