The Criminal Justice (Terrorism and Conspiracy) Act 1998 is a law passed in the United Kingdom, which came into force on 4 September 1998. It stipulated that it is an offense to participate in a conspiracy to carry out a course of conduct that leads to an offense in another jurisdiction. It gave courts in England and Wales the authority to try conspiracies to commit offences abroad. The law also provided stricter punishment for being a member of a terror group. Parts of it were replaced by the Terrorism Act 2000 and the Proceeds of Crime Act passed in 2002.