Revises provisions governing search warrants authorized under the USA PATRIOT ACT to: (1) limit the authority to delay notice of the issuance of such a search warrant to circumstances where providing immediate notice of the warrant will endanger the life or physical safety of an individual, result in flight from prosecution or the intimidation of a potential witness, or result in the destruction of or tampering with the evidence sought under the warrant; and (2) require such delayed notification to be issued within seven days (currently, within a "reasonable period") after execution, with extensions by the court for additional periods of up to 21 calendar days each time that the court finds reasonable cause to believe that notice of the execution of the warrant would have such consequences. Requires the Attorney General, on a semiannual basis, to transmit to Congress and make public a report concerning all requests for delays of notice and for extensions of such delays.

Amends FISA to require, with respect to access by the Federal Bureau of Investigation to business records for foreign intelligence and international terrorism investigations, that there be specific and articulable facts giving reason to believe that the person to whom the records pertain is a foreign power or agent.

Provides that libraries shall not be treated as wire or electronic communication service providers under provisions granting counterintelligence access to provider subscriber information, toll billing records information, or electronic communication transactional records.

Redefines "domestic terrorism" to mean activities that involve acts dangerous to human life that constitute a Federal crime of terrorism (currently, that violate criminal laws).