Without knowing which document the question is referring to, it is difficult to provide a specific answer. However, in general, the idea that even former presidents can be arrested is supported by the principle of the rule of law, which holds that no one, including current or former government officials, is above the law. This principle is enshrined in many national constitutions and international laws, including the United States Constitution, which provides that "no person" shall be immune from prosecution for crimes committed while in office. Additionally, the U.S. Supreme Court has held that even sitting presidents are not immune from criminal investigation or prosecution, which suggests that former presidents can also be subject to arrest and prosecution for criminal offenses committed while in office or after leaving office.