; relating to blocking property of weapons of mass destruction proliferators and their supporters) with respect to— (i) each vessel identified under subsection (a)(2)(B); and (ii) each owner or operator of such a vessel identified under clause (vii) of that subsection; and (B) include each such vessel, owner, and operator on the list of specially designated nationals and blocked persons maintained by the Office of Foreign Assets Control of the Department of the Treasury. 303. Prohibition on actions altering application of certain sanctions with respect to the Islamic Republic of Iran (a) In general On and after the date of the enactment of this Act, the President may not take any action described in subsection (c) if taking the action would significantly alter the application of sanctions described in subsection (d). (b) Application to existing actions Any action described in subsection (c) taken before the date of the enactment of this Act is rescinded. (c) Actions described An action described in this subsection is— (1) any termination or waiver of the application of sanctions described in subsection (d); (2) any licensing action with respect to such sanctions; or (3) any removal of any person from the list of specially designated nationals and blocked persons maintained by the Office of Foreign Assets Control of the Department of the Treasury. (d) Sanctions described The sanctions described in this subsection are sanctions under— (1) section 1245(d)(1) of the National Defense Authorization Act for Fiscal Year 2012 ( 22 U.S.C. 8513a(d)(1) )