each financial institution that is a United States person and has within its possession or control assets that are property or interests in property of a foreign person that is on the list required under section 3(a) if such property or interests in property are in the United States, are or come within the United States, or are or come within the possession or control of a United States person to certify to the Secretary that, to the best of the knowledge of such financial institution, such financial institution has frozen all assets within the possession or control of such financial institution that are required to be frozen pursuant to subsection (a). (d) Regulatory authority The President, acting through the Secretary of the Treasury, shall issue such regulations, licenses, and orders as are necessary to carry out this section. 6. Reports to Congress (a) In general The Secretary of State, in consultation with the heads of other relevant Federal agencies, shall submit to the appropriate congressional committees a report on the actions taken to carry out this Act, including— (1) a description of each foreign person on the list required under section 3(a)