What did the lone wolf provision allow the Foreign Intelligence Surveillance Court to authorize?

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George W. Bush: signing of USA PATRIOT Act — USA PATRIOT Act Pres. George W. Bush signing the USA PATRIOT Act in the East Room of the White House, Washington, D.C., October 26, 2001.

The "lone wolf" provision was not part of the original USA PATRIOT Act of 2001; rather, it originated in the Intelligence Reform and Terrorism Prevention Act of 2004 and was later extended by subsequent reauthorizations of the PATRIOT Act.1

This provision allowed the Foreign Intelligence Surveillance Court (FISC) to authorize electronic surveillance and physical searches targeting non-U.S. persons who are engaged in international terrorism or activities in preparation for such acts, even if they are not affiliated with a specific foreign power or organization.1