When required by the supreme court, and except as otherwise provided in AS 18.66.160, the commissioner shall serve and execute all process issued by the court of appeals, the superior court, and the district courts; attend to and wait upon grand and petit juries; maintain order; attend the sessions of the courts; and exercise the power and perform the duties concerning all matters within the jurisdiction of the courts as may be assigned. The commissioner is the executive officer of the court of appeals, the superior court, and district courts.