Fam. Code Section 201.302
(a)A judge of a court that is designated as a juvenile court may appoint a full-time or part-time associate judge to perform the duties authorized by this chapter if the commissioners court of a county in which the court has jurisdiction has authorized creation of an associate judge position.
(b)If a court has jurisdiction in more than one county, an associate judge appointed by that court may serve only in a county in which the commissioners court has authorized the appointment.
(c)If more than one court in a county has been designated as a juvenile court, the commissioners court may authorize the appointment of an associate judge for each court or may authorize one or more associate judges to share service with two or more courts.
(d)If an associate judge serves more than one court, the associate judge’s appointment must be made as established by local rule, but in no event by less than a vote of two-thirds of the judges under whom the associate judge serves.
Section 201.302 — Appointment,
https://statutes.capitol.texas.gov/Docs/FA/htm/FA.201.htm#201.302 (accessed Dec. 2, 2023).