; or (B) any regulation of an Executive agency (as defined in section 105 of title 5, United States Code) or an establishment in the legislative branch of the Federal Government. . 8. Severability If any provision of this Act or an amendment made by this Act, or the application of such a provision or amendment to any person or circumstance, is held to be unenforceable or invalid, the remaining provisions of this Act and amendments made by this Act, and the application of the provision or amendment so held to other persons not similarly situated or to other circumstances, shall not be affected thereby. 9. Effective date This Act and the amendments made by this Act shall take effect on the date that is 18 months after the date of enactment of this Act.