; and (2) inserting new subsection (d) to read as follows: (d) Commission of terrorist acts after naturalization (1) In general If a person who has been naturalized shall, within 15 years following such naturalization, participate in any act described in subsection (d)(2), such act or acts shall be considered prima facie evidence that such person was not attached to the principles of the Constitution of the United States and was not well disposed to the good order and happiness of the United States at the time of naturalization, and, in the absence of countervailing evidence, it shall be sufficient in the proper proceeding to authorize the revocation and setting aside of the order admitting such person to citizenship and the cancellation of the certificate of naturalization as having been obtained by concealment of a material fact or by willful misrepresentation, and such revocation and setting aside of the order admitting such person to citizenship and such canceling of certificate of naturalization shall be effective as of the original date of the order and certificate, respectively. (2) Acts described The acts described in this paragraph that shall subject an individual to denaturalization under subsection (d)(1) are the following: (A) Any activity a purpose of which is the opposition to, or the control or overthrow of, the Government of the United States by force, violence, or other unlawful means. (B) Engaging in a terrorist activity (as defined in clauses (iii) and (iv) of section 212(a)(3)(B)). (C) Incitement of terrorist activity under circumstances indicating an intention to cause death or serious bodily harm. (D) Receiving military-type training (as defined in section 2339D(c)(1) of title 18, United States Code) from or on behalf of any organization that, at the time the training was received, was a terrorist organization (as defined in section 212(a)(3)(B)(vi)). . (b) Effective date The amendments made by subsection (a) shall take effect on the date of the enactment of this Act and shall apply to acts