An action pursuant to this subsection shall be heard and determined by a court of three judges in accordance with the provisions of
section 2284 of title 28 and any appeal shall lie to the Supreme Court. The court shall retain jurisdiction of any action pursuant to this subsection for ten years after judgment and shall reopen the action upon motion of the Attorney General or any aggrieved person alleging that conduct has occurred which, had that conduct occurred during the ten-year periods referred to in this subsection, would have precluded the issuance of a declaratory judgment under this subsection. The court, upon such reopening, shall vacate the declaratory judgment issued under this section if, after the issuance of such declaratory judgment, a final judgment against the State or subdivision with respect to which such declaratory judgment was issued, or against any governmental unit within that State or subdivision, determines that denials or abridgements of the right to vote on account of race or color have occurred anywhere in the territory of such State or political subdivision or (in the case of a State or subdivision which sought a declaratory judgment under the second sentence of this subsection) that denials or abridgements of the right to vote in contravention of the guarantees of subsection (f)(2) have occurred anywhere in the territory of such State or subdivision, or if, after the issuance of such declaratory judgment, a consent decree, settlement, or agreement has been entered into resulting in any abandonment of a voting practice challenged on such grounds.