With this power of exclusion goes also the power to assert a considerable degree of control over aliens after their admission to the country. By the Alien Registration Act of 1940[1071] it was provided that all aliens in the United States, fourteen years of age and over, should submit to registration and finger printing, and wilful failure to do so was made a criminal offense against the United States. This Act, taken in conjunction with other laws regulating immigration and naturalization, has constituted a comprehensive and uniform system for the regulation of all aliens and precludes enforcement of a State registration act. Said the Court, speaking by Justice Black: "With a view to limiting prospective residents from foreign lands to those possessing the qualities deemed essential to good and useful citizenship in America, carefully defined qualifications are required to be met before aliens may enter our country. These qualifications include rigid requirements as to health, education, integrity, character, and adaptability to our institutions. Nor is the alien left free from the application of federal laws after entry and before naturalization. If during the time he is residing here he should be found guilty of conduct contrary to the rules and regulations laid down by Congress, he can be deported. At the time he enters the country, at the time he applies for permission to acquire the full status of citizenship, and during the intervening years, he can be subjected to searching investigations as to conduct and suitability for citizenship."[1072] The Act of June 27, 1952, repeats these requirements of the Act of 1940.[1073] Recent cases underscore the sweeping nature of the powers of the National Government to exclude aliens from the United States and to deport by administrative process members of excluded classes. In Knauff _v._ Shaughnessy,[1074] decided early in 1950, an order of the Attorney General excluding, on the basis of confidential information, a wartime bride who was prima facie entitled to enter the United States under The War Brides Act of 1945,[1075] was held to be not reviewable by the courts; nor were regulations on which the order was based invalid as representing an undue delegation of legislative power. Said the Court: "Normally Congress supplies the conditions of the privilege of entry into the United States. But because the power of exclusion of aliens is also inherent in the executive department of the sovereign, Congress may in broad terms authorize the executive to exercise the power, e.g., as was done here, for the best interests of the country during a time of national emergency. Executive officers may be entrusted with the duty of specifying the procedures for carrying out the congressional intent."[1076]