In Public Prosecutor v Taw Cheng Kong, the Court of Appeal of Singapore overruled a High Court decision in the only time a statute in Singapore had been ruled unconstitutional.

Public Prosecutor v. Taw Cheng Kong is a landmark case decided in 1998 by the Court of Appeal of Singapore which shaped the landscape of Singapore's constitutional law. The earlier High Court decision, Taw Cheng Kong v. Public Prosecutor, was the first instance in Singapore's history that a statutory provision was struck down as unconstitutional. The matter subsequently reached the Court of Appeal when the Public Prosecutor applied for a criminal reference for two questions to be considered. The questions were:

1. whether section 37(1) of the Prevention of Corruption Act ("PCA") was ultra vires the powers of the legislature on the ground that the legislature had, under section 6(3) of the Republic of Singapore Independence Act 1965, been divested of the power to legislate extraterritorially; and
2. whether section 37(1) of the PCA was discriminatory against Singapore citizens and hence inconsistent with Article 12(1) of the Constitution of the Republic of Singapore.

The Court of Appeal of Singapore is the highest court in the judicial system of Singapore. It is the upper division of the Supreme Court of Singapore, the lower being the High Court. The Court of Appeal consists of the chief justice, who is the president of the Court, and the judges of the Court of Appeal. The chief justice may ask judges of the High Court to sit as members of the Court of Appeal to hear particular cases. The seat of the Court of Appeal is the Supreme Court Building.

The High Court of Singapore is the lower division of the Supreme Court of Singapore, the upper division being the Court of Appeal. The High Court consists of the chief justice 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 and insolvency matters respectively. In 2014 the Family Division of the High Court was created, and in 2015 the Singapore International Commercial Court ("SICC") was established as a division of the High Court. The current divisions of the High Court are the General Division and the Appellate Division. The seat of the High Court is the Supreme Court Building.