The commissioners courts in the counties of each of the 15 courts of appeals districts may pay additional compensation in an amount that does not exceed the limitations of Section 659.012 to each of the justices of the courts of appeals, other than a justice of the Court of Appeals of the Fifteenth Court of Appeals District, residing within the court of appeals district that includes those counties. The compensation is for all extrajudicial services performed by the justices.
Tex. Gov't. Code § 31.001