of such election shall be deemed final and any force or effect given thereto. The district court shall hear and determine such matters immediately after the filing of such application. The remedy provided in this subsection shall not preclude any other remedy available under State or Federal law. (f) Jurisdiction of proceedings The district courts of the United States shall have jurisdiction of proceedings instituted pursuant to this Act and shall exercise the same without regard to whether a person asserting rights under the provisions of this Act shall have exhausted any administrative or other remedies that may be provided by law. (g) Attorney’s fees In any action or proceeding to enforce the voting guarantees of the Twenty-sixth Amendment, the court, in its discretion, may allow the prevailing party, other than the United States, a reasonable attorney’s fee, reasonable expert fees, and other reasonable litigation expenses, as part of the costs. 9. Severability If any provision of this Act or the application of such provision to any person or circumstance is held invalid, the remainder of this Act and the application of such provision to other persons or circumstances shall not be affected thereby. 10. Definitions In this Act: (1) Age group The term age group means the number of individuals who are 18 years or older, disaggregated by the number of individuals in each five year age period. (2) Demographic group The term demographic group means each group which section 3 protects from the denial or abridgement of the right to vote on account of age. (3) Institution of higher education The term institution of higher education has the meaning given that term in section 101(a) of the Higher Education Act of 1965 ( 20 U.S.C. 1001(a) ). (4) Election for Federal office The term election for Federal office means any general, special, primary, or runoff election held solely or in part for the purpose of electing any candidate for the office of President, Vice President, Presidential elector, Senator, Member of the