; (B) foreign persons for which there is a reasonable basis to find that the person has conducted or attempted to conduct one or more sensitive transactions or activities described in subsection (c); and (C) foreign persons listed under the headings Attachment 3 or Attachment 4 in Annex A of United Nations Security Council Resolution 2231, adopted on July 20, 2015. . (c) Sensitive transactions and activities described Section 301(c) of the Iran Threat Reduction and Syria Human Rights Act of 2012 ( 22 U.S.C. 8741(c) ) is amended— (1) in paragraph (1)— (A) by striking $1,000,000 and inserting $500,000 ; and (B) by inserting Iranian financial institution or after involving a ; (2) by redesignating paragraphs (3), (4), and (5) as paragraphs (6), (7), and (8), respectively; and (3) by inserting after paragraph (2) the following new paragraphs: (3) a transaction to provide material support for an organization designated as a foreign terrorist organization under section 219(a) of the Immigration and Nationality Act ( 8 U.S.C. 1189(a) ) or support for an act of international terrorism (as defined in section 14 of the Iran Sanctions Act of 1996 ( Public Law 104–172 ; 50 U.S.C. 1701 note)); (4) a transaction to provide material support to a foreign person whose property and access to property has been blocked pursuant to Executive Order 13224 (September 23, 2001; relating to blocking property and prohibiting transactions with persons who commit, threaten to commit, or support terrorism); (5) a transaction to provide material support for the Government of Syria or any agency or instrumentality thereof