; and (2) the Secretary submits a written justification of the modification to the Advisory Panel and the appropriate congressional committees. (j) Distribution to election agencies The Secretary shall distribute the guidelines required under subsection (b) to all election agencies known to the Department and the Commission. (k) Publication The Secretary shall make the guidelines required under subsection (b) available on the public website of the Department. (l) Periodic review Not later than January 31, 2019, and once every 2 years thereafter, the Advisory Panel shall review and update the guidelines required under subsection (b). (m) Rule of construction Nothing in the section shall be construed to subject the process for developing the guidelines required under subsection (b) to subchapter II of chapter 5, and chapter 7, of title 5, United States Code (commonly known as the Administrative Procedure Act ). 6. Reports to Congress (a) Reports on foreign threats to elections (1) In general Not later than 30 days after the date of enactment of this Act, and 30 days after the end of each fiscal year thereafter, the Secretary and the Director of National Intelligence, in coordination with the heads of the appropriate Federal entities, shall submit a joint report to the appropriate congressional committees on foreign threats to elections in the United States, including physical and cybersecurity threats. (2) Voluntary participation by States The Secretary shall solicit and consider comments from all State election agencies. Participation by an election agency in the report under this subsection shall be voluntary and at the discretion of the State. (b) Reports on grant program Not later than 2 years after the date of enactment of this Act, and every 4 years thereafter, the Comptroller General of the United States shall submit a report to the appropriate congressional committees on the Department grant program established under section 7, including how grant funds have been distributed and used to implement the