South Africa has an independent judicial authority. The 1996 Constitution states that the judicial authority is vested in the courts, which are independent from the legislature and executive and subject to the laws of the Constitution and interprets laws.

In the context of South Africa's judicial system, official structures of the court system typically include the Constitutional Court, the Supreme Court of Appeal, High Courts, and Magistrates' Courts. However, entities or bodies that are not officially part of the court system, such as community courts, informal dispute resolution mechanisms, or administrative tribunals, would not be regarded as part of the official structures of the court system. If you have specific options in mind, please provide them so I can assist you more accurately in identifying which one is not part of the official court structures.