The judiciary of Jamaica is based on the judiciary of the United Kingdom. The courts are organized at four levels, with additional provision for appeal to the Judicial Committee of the Privy Council in London. The Court of Appeal is the highest appellate court. The Supreme Court has unlimited jurisdiction in all cases, and sits as the Circuit Court to try criminal cases. The Resident's Magistrate's court in each parish hears both criminal and civil cases, excluding grave offences. The Petty Sessions are held under Justices of the Peace, with power to hear minor crimes.
The Court of Appeal is the highest appellate court in Jamaica; it is superior to the Supreme Court. The Court is composed of a President and six other Judges. The Chief Justice is also a judge ex officio of the Court of Appeal, but participates only when asked to do so by the President. Although the Court of Appeal is the highest court in Jamaica, its judgements may themselves be appealed to the Queen-in-Council, in which case they are heard by the Judicial Committee of the Privy Council in London.
The Supreme Court has unlimited original jurisdiction in criminal and civil cases. The Chief Justice of the Supreme Court is the head of the judiciary. Besides the Chief Justice, the court is composed of the Senior Puisne Judge and additional Puisne Judge, with their number established by Parliament. In response to increasing case load, Parliament in 2008 increased the number of spaces on the Supreme Court from 26 to 40 with the new spaces filled over time by appointment of new judges.
The Supreme Court has a number of divisions, in which a subset of the justices hear specific types of cases. The Circuit Court is the division for criminal cases, holding sessions in the individual parishes. The The Justices of the Peace (Appeals) Act states that the "Circuit Court for every parish in this Island shall be the Appeal Court for matters arising in every such parish." Other divisions of the Supreme Court are the Gun Court, the Commercial Court, the Revenue Court, and the Family Court. In the civil division of the Supreme Court the judge sits alone without the jury, except in cases of defamation. The Supreme Court also serves as a Constitutional Court for Jamaica.
Each parish has a Resident Magistrate's Court with power to hear civil and criminal matters. The jurisdiction of each court extends one mile beyond the border of its parish. Severe crimes such as rape, treason, and murder are not tried by the Resident Magistrate's Courts, but are referred to the Supreme Court after a preliminary hearing.
The Resident Magistrate's Courts also have a number of divisions, including the Family Court, Juvenile Court, Traffic Court, Small Claims Court, Night Court, Drug Court, and Gun Court (Resident Magistrate's Division).
In 2001 Jamaica signed the agreement establishing the Caribbean Court of Justice. The Court has a dual role: it has original jurisdiction and functions as an international court in interpreting and applying the Treaty of Chaguaramas, which established CARICOM; and it is intended to replace the Privy Council as a court of last appeal for the countries of the Commonwealth Caribbean.
In 2004 the Jamaican Parliament passed an establishing the CCJ as the highest court in its Original Jurisdiction in the interpretation of the Revised Treaty of Chagaramus, while at the same time attempting to replace Privy Council as the final appellate court in Jamaica. However, in 2005 the Privy Council struck down the change to the final appellate court as unconstitutional because the Privy Council's status is an entrenched provision in the Jamaican Constitution and as such more would be required to remove the Privy Council as the final appellate court. The Council ruled that although Parliament was within its powers to remove appellate jurisdiction from the Privy Council, it could not grant jurisdiction to the CCJ through an ordinary act. Instead, such a change must meet the more rigorous standards for amending "entrenched" provisions of the Jamaican Constitution. As a result, the Privy Council remains the final court of appeal for Jamaica.
^Hudson, Rex A.; Seyler, Daniel J. (1989). "Jamaica". In Meditz, Sandra W.; Hanratty, Dennis M. Islands of the Commonwealth Caribbean. Washington, D.C.: Federal Research Division, Library of Congress. LCCF2131.I85 1989. Retrieved 2009-06-12.