; (4) assume the functions of a law enforcement officer, peace officer, or public official, whether or not acting under color of law, and thereby assert authority or purport to assert authority over another person without the consent of that person; or (5) train to engage in any activity described in paragraphs (1) through (4). (b) Circumstances The circumstances described in this subsection are that the conduct described in subsection (a)— (1) involves— (A) travel across a State line or national border; or (B) the use of the channels, facilities, or instrumentalities of interstate or foreign commerce; (2) involves a firearm, explosive or incendiary device, or dangerous weapon that has traveled in interstate or foreign commerce; (3) involves the use of ammunition or a large capacity ammunition feeding device that has traveled in interstate or foreign commerce; (4) obstructs, delays, or affects interstate or foreign commerce; or (5) occurs wholly within any commonwealth, territory, or possession of the United States. (c) Exceptions Subsection (a) shall not apply to— (1) the armed forces of the United States, the National Guard, the Naval Militia, any regularly organized State militia, or any unorganized or reserve militia called into service by a State or the United States; (2) a group of individuals who— (A) associate as a military organization solely for purposes of historical reenactment or study; or (B) parade in public as part of a bona fide veterans organization with no intent to engage in the activities prohibited by subsection (a); (3) students in an educational institution authorized by the Federal Government or a State to teach military science as a prescribed part of the course of instruction, when under the supervision of a military instructor