Each report required by subsection (b) shall be submitted in unclassified form but may include a classified annex.
The Secretary of State, in consultation with the Secretary of the Treasury, may, instead of submitting a written report required under subsection (b) (except with respect to the list required by subsection (b)(4)), provide to the appropriate congressional committees a briefing, together with a written justification, if doing so would better serve the national interests of the United States.