31 CFR § 594.311 - Terrorism.
The term terrorism means an activity that:
(a) Involves a violent act or an act dangerous to human life, property, or infrastructure; and
(b) Appears to be intended:
(1) To intimidate or coerce a civilian population;
(2) To influence the policy of a government by intimidation or coercion; or
(3) To affect the conduct of a government by mass destruction, assassination, kidnapping, or hostage-taking.