(a) If a statute that establishes a multicounty statutory county court does not designate one of the counties that compose the multicounty statutory county court as the administrative county for that court, the county with the greatest population of the counties composing the court at the time the court is established is the administrative county for that court.
(b) The commissioners courts of the counties that compose a multicounty statutory county court may enter into an agreement to provide support for the court. The administrative county for the court may receive contributions from the other counties composing the court to pay the operating expenses of the court.

(c) Except for money provided by state appropriations or under an agreement under Subsection (b), the administrative county shall pay out of the county’s general fund the salaries, compensation, and expenses incurred in operating the multicounty statutory county court.
(d) Notwithstanding § 25.0015, the state shall annually compensate the administrative county of a multicounty statutory county court for the salary of the judge of the multicounty statutory county court in an amount equal to 100 percent of the state salary paid to a district judge with comparable years of service as the multicounty statutory county court judge, as set by the General Appropriations Act in accordance with § 659.012. For purposes of this subsection, the years of service of a multicounty statutory county court judge include any years of service as:
(1) an appellate court, district court, statutory county court, or statutory probate court justice or judge; or
(2) a district attorney, criminal district attorney, or county attorney.
(e) The court fees and costs collected by the clerk of a multicounty statutory county court shall be deposited in the appropriate county fund as provided by law.