; and (B) after the date on which the shareholders and directors described in that paragraph have been informed regarding the precise nature of the proposed expenditure, including— (i) the amount of the proposed expenditure; and (ii) the candidate and election to which the proposed expenditure relates. (c) Enforcement (1) Shareholder suit A shareholder of a United States corporation may bring a civil action in an appropriate district court of the United States to enjoin a United States corporation from making a political expenditure in support of or in opposition to any candidate for Federal, State, or local public office that violates the requirements under subsection (b). (2) Revocation of charter The Office may revoke the charter of a United States corporation that knowingly or repeatedly violates the requirements under subsection (b). 9. Petition for revocation of charter (a) Filing of revocation petition The attorney general of a State may file a petition with the Office to revoke the charter of a United States corporation that is organized in that State or that does business in that State. (b) Timing of response and decision If a revocation petition is filed under subsection (a) with respect to a United States corporation— (1) not later than 180 days after the date on which the petition is filed, the United States corporation may file a response that explains why revoking the charter of the United States corporation is not justified in consideration of the factors described in subsection (c)(2); and (2) the Director shall issue a ruling with respect to the petition not later than 180 days after the earlier of the date that is— (A) 180 days after the date on which the petition is filed