The U.S. Immigration Act refers to various laws enacted to regulate immigration to the United States. One significant piece of legislation is the Immigration and Nationality Act of 1965, which abolished an earlier quota system based on national origin. This act aimed to create a more equitable immigration process, allowing for family reunification and skilled workers to enter the country. Another important law is the Immigration Reform and Control Act of 1986, which provided a pathway to legal status for certain undocumented immigrants. This act also aimed to strengthen border security and enforce penalties on employers who hired undocumented workers, reflecting ongoing debates about immigration policy in the U.S.