1. Short titles This Act may be cited as the Reporting Efficiently to Proper Officials in Response to Terrorism Act of 2019 or the REPORT Act . 2. Duty to report (a) Duty imposed Except as provided in subsection (c), whenever an act of terrorism occurs in the United States, it shall be the duty of the primary Government agency investigating such act to submit, in collaboration with the Secretary of Homeland Security, the Attorney General, the Director of the Federal Bureau of Investigation, and, as appropriate, the Director of the National Counterterrorism Center, an unclassified report (which may be accompanied by a classified annex) to Congress concerning such act not later than 1 year after the completion of the investigation. Reports required under this subsection may be combined into a quarterly report to Congress. (b) Content of reports Each report under this section shall include— (1) a statement of the facts of the act of terrorism referred to in subsection (a), as known at the time of the report; (2) an explanation of any gaps in national security that could be addressed to prevent future acts of terrorism; (3) any recommendations for additional measures that could be taken to improve homeland security, including potential changes in law enforcement practices or changes in law, with particular attention to changes that could help prevent future acts of terrorism