1. Short title This Act may be cited as the Anti-terrorism Clarification Act of 2018 . 2. Clarification of the term act of war (a) In general Section 2331 of title 18, United States Code, is amended— (1) in paragraph (4), by striking and at the end; (2) in paragraph (5), by striking the period at the end and inserting ; and ; and (3) by adding at the end the following: (6) the term military force does not include any person that— (A) has been designated as a— (i) foreign terrorist organization by the Secretary of State under section 219 of the Immigration and Nationality Act ( 8 U.S.C. 1189 ); or (ii) Specially Designated Global Terrorist (as such term is defined in section 594.310 of the Code of Federal Regulations) by the Secretary of State or the Secretary of the Treasury