From Secrecy News :
A LEGAL ANALYSIS OF THE REAUTHORIZED PATRIOT ACT (CRS)
On March 9, the President signed into law the USA Patriot Improvement and Reauthorization Act, which made permanent 14 of the 16 sections of the Patriot Act that were set to expire. A new report from the Congressional Research Service provides a detailed, 74 page analysis of the Act, including the various modifications made in the reauthorization process.
See "USA PATRIOT Improvement and Reauthorization Act of 2005: A LegalAnalysis," March 24, 2006: http://www.fas.org/sgp/crs/intel/RL33332.pdf