accepting the retrocession described in section 3(a) until the expiration of the 1-year period which begins on the date the Director of the Congressional Budget Office submits the report prepared under paragraph (1) to the Governor of Maryland. 9. Effective date The provisions of this Act and the amendments made by this Act shall take effect on the date the President issues a proclamation under section 8 or the date of the ratification of an amendment to the Constitution of the United States repealing the twenty-third article of amendment to the Constitution, whichever comes later.