Focus on U.S. immigration and U.S. law:
Statutory laws enacted by the U.S. government as authorized by the U.S. Constitution. Once a bill is passed by a simple majority in both houses of Congress and subsequently signed by the President, it completes the legislative process and officially becomes federal law. Before being enacted as federal law, a bill must be approved by a majority vote in both the Senate and the House of Representatives and then signed by the President.
Legislative Process
A statute or resolution approved by both houses of Congress must undergo one of the following procedures to become law:
The President signs the bill; the President takes no action within ten days (excluding Sundays) of receiving the bill while Congress is in session; or, after a presidential veto, Congress initiates a reconsideration during the session (the bill must receive a two-thirds majority vote to override the presidential veto). Bills passed through the first two procedures are "promulgated" by the President. If a bill is passed through the third method, the congressional clerks are responsible for the promulgation of the law during the final reconsideration period.
Under the provisions of the U.S. Constitution, if the President does not express an opinion on a bill or resolution and return it to Congress within the specified time limit, the bill automatically becomes law; however, if Congress adjourns during this period, the bill is discarded and cannot be reconsidered (see: pocket veto). Furthermore, if the President vetoes a bill or resolution while Congress is in session, a successful override requires a two-thirds majority vote in both houses of Congress.
Acts of Congress that become law are listed in the United States Statutes at Large. Compared to the privately published United States Code, almost all acts undergo minor textual revisions.
All Acts of Congress must not violate the Constitution, nor may they exceed the powers granted to Congress by the Constitution. Otherwise, the Supreme Court of the United States may declare the act unconstitutional.