You are looking at a part of the Crimes Act 1961 called the Interception warrant. This part is about rules for getting a special warrant to intercept communications. It is empowered by section 312D(1) of the Crimes Act 1961. You can find more information about this in the Crimes Act 1961. The Interception warrant is a schedule, which is extra information that is not part of the main act. It has been repealed, which means it is no longer in use. When you read about the Interception warrant, you will see it refers to other parts of the law, like section 312D(1). You can follow these links to learn more about the law. The law uses special words and phrases, but it is written to help you understand what it says.