length of service of state court judges, but state laws usually fix a retirement age. For example, in New South Wales, judges must retire at age 72, though they can remain as "acting judges" until age 76. Australian court hierarchy The hierarchy consists of a variety of courts and tribunals at both the federal and State and Territory levels, with the High Court being the highest court in the Australian judicial system. A single body of Australian common law is applied in the various Australian courts, and ultimately determined by the High Court now that appeals to the (British) Judicial Committee of the Privy Council have been abolished. Superior and inferior courts The High Court has described the concept of a superior court (and associated 'notions derived from the position of pre-Judicature common law courts') as having 'no ready application in Australia to federal courts.' Despite this, Australian courts are frequently characterised as either 'superior' or 'inferior.' The Federal Court and the supreme courts of each State and Territory are generally considered to be superior courts. There is no single definition of the term 'superior court' (or 'superior court of record'). In many respects Australian superior courts are similar to the Senior Courts of England and Wales. In Australia, superior courts generally: have unlimited jurisdiction in law and equity, or at least are not subject to jurisdictional limits as to the remedies they may grant; determine appeals, at least as part of their jurisdiction; are composed of judges whose individual decisions are not subject to judicial review or appeal to a single judge; are composed of judges entitled to the style and title The Honourable Justice; and regularly publish their decisions in written form. Inferior courts are those beneath superior courts in the appellate hierarchy, and are generally seen to include the magistrates' and district (or county) court of each State as well as the Federal Circuit and Family Court. Inferior courts are typically characterised by: jurisdiction conferred by statute and limited as to subject matter or the quantum of relief; and amenability to judicial review by a single judge of a superior court where a right of appeal is not available. Federal courts These courts among them have jurisdiction over Commonwealth law, that is, law made by the Federal parliament of Australia. High Court of Australia The High Court is the highest court in the Australian judicial hierarchy. It