FBI Authority to Investigate Violations of Subtitle E of Title 26 or 18 U.S.C. §§ 921–930

The Federal Bureau of Investigation has authority to participate in investigations of violations of Subtitle E of Title 26 and 18 U.S.C. §§ 921–930 but may not supplant the primacy of the Department of the Treasury over investigations of such violations, unless the FBI has reason to believe that the investigation concerns a crime of terrorism over which a statute or Presidential Decision Directive 39 has given the FBI primary responsibility.