In an earlier statute Congress excluded from admission to the United States persons who have departed from the jurisdiction of the United States for the purpose of evading or avoiding training or service in the armed forces of the United States during time of war or during a period declared by the President to be a period of national emergency. Among the myriad restrictions of the Internal Security Act of 1950 are to be found additional categories of aliens ineligible for entry into the United States, principally aliens who at any time have been members of the Communist or other totalitarian party of any state of the United States, of any foreign state, or of any political or geographical subdivision of any foreign state, and aliens who advocate the economic, international, and governmental doctrines of world communism or of any form of totalitarianism.[189] Naturalization is refused or citizenship withdrawn from persons falling into classifications created by a security-conscious Congress. The Nationality Act of 1940[190] restricted the eligibility of alien enemies for nationalization to those whose declaration of intention was made not less than two years prior to the beginning of the state of war and specified that enemy aliens were eligible for apprehension and removal at any time previous to actual naturalization. Section 25 of the Internal Security Act amends the Nationality Act of 1940 to make ineligible for naturalization persons subscribing to or giving evidence of subscribing to anarchist, communist, or any totalitarian movement or body of sentiment. Those who within the ten years next preceding the filing of naturalization petitions, or in the period between such filing and the time of taking the final oath of citizenship, have been members of, or affiliated with, communist-front organizations registered under the Subversive Activities Control Act of 1950, must rebut a presumption that they are persons not attached to the principles of the Constitution and thus ineligible for citizenship.[191] Congress has devised appropriate means for handling the cases of persons seeking to renounce American citizenship. To facilitate the surrender of United States citizenship by persons of Japanese ancestry, Congress in July, 1944, specified that with the permission of the Attorney General, and when the United States is at war, citizens may accomplish expatriation by the simple act of making in the United States a formal written renunciation of nationality in such form as may be prescribed by, and before an officer designated by the Attorney General.[192] The assumption that persons departing from or remaining outside of the jurisdiction of the United States in time of war for the purpose of evading or avoiding military service renounce their American citizenship was created by an Act of Congress in September, 1944.[193]