In general— The existing judgeships for the district of Kansas and the eastern district of Missouri authorized by section 203(c) of the Judicial Improvements Act of 1990 (Public Law
101–650;
28 U.S.C. 133 note) and the existing judgeships for the eastern district of Texas, the district of Arizona, the central district of California, the southern district of Florida, the western district of North Carolina, and the district of New Mexico authorized by section 312(c) of the 21st Century Department of Justice Appropriations Authorization Act (Public Law
107–273;
28 U.S.C. 133 note), as of the effective date of this Act, shall be authorized under section 133 of title 28, United States Code, and the incumbents in those offices shall hold the office under section 133 of title 28, United States Code, as amended by this Act.