; limitations. . 4. Limitation on jurisdiction (a) Chapter 85 of title 28, United States Code, is amended by adding at the end thereof the following new section and renumbering any appropriate section accordingly: 1370. Limitations on jurisdiction Notwithstanding any other provision of law, the district courts shall not have jurisdiction of any case or question which the Supreme Court does not have jurisdiction to review under section 1261 of this title. . (b) The section analysis at the beginning of chapter 85 of title 28 is amended by adding at the end thereof the following new item: 1370. Limitations on jurisdiction. . 5. Effective date The provisions of this Act shall take effect immediately upon enactment. 6. Severability If any provision of this Act or the application thereof to any person or circumstance is judicially determined to be invalid, the validity of the remainder of the Act and the application of such provision to other persons and circumstances shall not be affected by such determination.