; and (2) by striking may be used and inserting may have been used . (b) Application (1) In general The amendments made by this section shall apply to any offense committed on or after the date of the enactment of this Act. (2) Rule of construction The amendments made by this section shall not be construed to create any right to challenge a sentence imposed before the date of the enactment of this Act under section 924 of title 18, United States Code. II Mass Violence Prevention Center 201. Mass Violence Prevention Center Part G of the Omnibus Crime Control and Safe Streets Act of 1968 ( 34 U.S.C. 10211 et seq.) is amended by adding at the end the following: 702. Mass Violence Prevention Center (a) Establishment There is established in the Department of Justice a Mass Violence Prevention Center, which shall be supervised by the Director of Mass Violence Prevention (in this section referred to as the Director ), who shall be appointed by the Director of the Federal Bureau of Investigation with the approval of the President. (b) Authority of FBI Director The Director of the Federal Bureau of Investigation shall have authority, direction, and control over the Mass Violence Prevention Center and the Director of Mass Violence Prevention. (c) Reporting Not later than 1 year after the date of the enactment of this section, and annually thereafter, the Director shall submit a report to the Attorney General with respect to the following matters: (1) The budget and programs of the Mass Violence Prevention Center. (2) The activities of the Director under subsection (f). (3) The conduct of intelligence operations implemented by other elements of the intelligence community. (d) Purpose The purpose of the Mass Violence Prevention Center shall be as follows: (1) To serve as the primary organization in the United States Government for analyzing and integrating all intelligence possessed or acquired by the United States Government pertaining to threats of mass violence. (2) To conduct strategic operational planning for mass