The President shall prohibit the opening, and prohibit or impose strict conditions on the maintaining, in the United States of a correspondent account or a payable-through account by a foreign financial institution that the President determines knowingly, on or after the date that is 180 days after January 2, 2013, conducts or facilitates a significant financial transaction for the sale, supply, or transfer to or from Iran of materials the sale, supply, or transfer of which would subject a person to sanctions under subsection (a).