; and (B) file petitions for appeal of a decision in the civil action. (2) Powers Nothing in this subsection may be construed to prevent the attorney general of a State from exercising the powers conferred on the attorney general by the laws of the State to conduct investigations, to administer oaths or affirmations, or to compel the attendance of witnesses or the production of documentary or other evidence. (3) Action by the Commission If the Commission institutes a civil action for violation of this title or a regulation promulgated under this title, no attorney general of a State may bring a civil action under subsection (b) against any defendant named in the complaint of the Commission for violation of this Act or a regulation promulgated under this Act that is alleged in the complaint. (d) Venue and service of process (1) Venue Any action brought under subsection (b) may be brought in— (A) the district court of the United States that meets applicable requirements relating to venue under section 1391 of title 28, United States Code; or (B) another court of competent jurisdiction. (2) Service of process In an action brought under subsection (b), process may be served in any district in which the defendant— (A) is an inhabitant