<P> Opponents of the law have criticized its authorization of indefinite detentions of immigrants; the permission given law enforcement officers to search a home or business without the owner's or the occupant's consent or knowledge; the expanded use of National Security Letters, which allows the Federal Bureau of Investigation (FBI) to search telephone, e-mail, and financial records without a court order; and the expanded access of law enforcement agencies to business records, including library and financial records . Since its passage, several legal challenges have been brought against the act, and federal courts have ruled that a number of provisions are unconstitutional . </P> <P> Many provisions of the act were to sunset beginning December 31, 2005, approximately four years after its passage . In the months preceding the sunset date, supporters of the act pushed to make its sun - setting provisions permanent, while critics sought to revise various sections to enhance civil liberty protections . In July 2005, the U.S. Senate passed a reauthorization bill with substantial changes to several sections of the act, while the House reauthorization bill kept most of the act's original language . The two bills were then reconciled in a conference committee that was criticized by Senators from both the Republican and Democratic parties for ignoring civil liberty concerns . </P> <P> The bill, which removed most of the changes from the Senate version, passed Congress on March 2, 2006, and was signed into law by President George W. Bush on March 9 and 10, 2006 . </P> <P> On May 26, 2011, President Barack Obama signed the PATRIOT Sunsets Extension Act of 2011, a four - year extension of three key provisions in the Act: roving wiretaps, searches of business records, and conducting surveillance of "lone wolves"--individuals suspected of terrorist - related activities not linked to terrorist groups . </P>

Which of the following is enforced through the usa patriot act