The immigration laws in the United States have experienced uneven progress. During colonial times independent colonies created their immigration laws. The first law governing the naturalization of foreigners was the Naturalization Act of 1790. However many years later the Chinese Exclusion Act was passed to stop the immigration of Chinese people. The Emergency Quota Act of 1921 and the Immigration Act of 1924 put a quota on how many immigrants were permitted, based on nationality and previous influx years. The Immigration and Nationality Act of 1952 led to the creation of the Immigration and Naturalization Service.