The main purpose of this legislation is to change how justices of the Supreme Court are appointed and how long they serve. The goal is to create a more predictable and structured process for appointing justices, ensuring that they serve a fixed term rather than for life. Key provisions of the legislation include the establishment of an 18-year term for each Supreme Court justice. The President will nominate one justice every two years, specifically during the first and third years after a presidential election. Once a justice is confirmed, they can only serve one 18-year term.