shall file a report with the Secretary of the Senate and the Clerk of the House of Representatives containing the information described in subsection (b) relating to the lobbying contact pertaining to the potential grant of executive clemency. . 6. Studies and reports (a) Studies (1) In general Beginning on the date that is 180 days after the date of enactment of this Act, and every other year thereafter, the Pardon Attorney shall conduct a study on the extent of compliance or noncompliance with this Act. (2) Reports to Congress Not later than April 1 of each year following the completion of the study required under subsection, the Pardon Attorney shall submit to Congress a report containing the findings of the study and any recommendations to improve compliance with this Act. 7. Severability If any provision of this Act, an amendment made by this Act, or the application of such a provision or amendment to any particular person or circumstance is held invalid, the remaining provisions of this Act and the amendments made by this Act, and the application of such remaining provisions and amendments to any other person or circumstance, shall not be affected thereby.