This document summarizes the rights of an arrested person under Article 5(3) and (4) of the Malaysian constitution. It discusses the three main rights: 1) the right to be informed of the grounds for arrest, 2) the right to consult a legal practitioner, and 3) the right to be defended by a legal practitioner of one's choice. It examines Malaysian case law that has interpreted and established limitations on these rights, such as allowing a reasonable delay before access to a lawyer to avoid interfering with police investigations. The document also discusses exceptions to these rights for enemy aliens under certain security laws.