Article 137 of the Constitution of the Republic of China provides for the national defense of the R.O.C. shall have its objective as the safeguarding of national security and the preservation of world peace. The organization of national defense shall be prescribed by law. This provision of Constitution clearly states that the purposes of national defense are "safeguarding of national security" and "preservation of world peace". Congress is empowered by the Constitution to make laws including the National Defense Act and the Organization Act of the Ministry of National Defense and to determine the national defense mission and organizational structure and construction of military command system. The state's administrative organs shall rule by law at the time of implementation of national tasks under the principle of the rule of law.