The High Court of the Republic of Singapore is the lower division of the Supreme Court of Singapore, the upper being the Court of Appeal. It consists of the Chief Justice of Singapore and the Judges of the High Court. Judicial Commissioners are often appointed to assist with the Court's caseload. There are two specialist commercial courts, the Admiralty Court and the Intellectual Property Court, and a number of judges are designated to hear arbitration-related matters. The seat of the High Court is the Supreme Court Building. The High Court exercises both original jurisdiction and appellate jurisdiction in civil and criminal matters. By possessing original jurisdiction, the Court is able to hear cases at first instance it can deal with trials of matters coming before the courts for the first time. A special aspect of the Court's original jurisdiction is its judicial review jurisdiction. The Court exercises two types of judicial review: judicial review under the Constitution of Singapore, and judicial review of administrative acts.