On Sept. 29, 2006 the U.S. Department of the Treasury (Treasury) released updated Anti-Terrorist Financing Guidelines: Voluntary Best Practices for U.S.-Based Charities, its third version of recommendations for charities since 2002. The new Guidelines reflect Treasury consideration of public comments on a December 2005 revision of the original Guidelines, published in 2002. A new Annex provides an unconvincing explanation of Treasury's perception that terrorist abuse of charities is a substantial problem. The 2006 Guidelines place greater emphasis on their voluntary nature, saying charities should apply them to a degree commensurate with their risk of "abuse and exploitation" by terrorists. However, the fundamental problems that lead the nonprofit sector to call for withdrawal of the Guidelines remain unchanged.