; (ii) upon so intervening, to be heard on all matters arising therein; and (iii) to file petitions for appeal. (B) Limitation on State action while Federal action is pending If the Commission or the Attorney General of the United States has instituted a civil action for violation of a regulation promulgated under section 4 (referred to in this subparagraph as the Federal action ), no State attorney general, official, or agency may bring an action under this subsection during the pendency of the Federal action against any defendant named in the complaint in the Federal action for any violation of such regulation alleged in such complaint. (4) Rule of construction For purposes of bringing a civil action under this subsection, nothing in this Act shall be construed to prevent an attorney general, official, or agency of a State from exercising the powers conferred on the attorney general, official, or agency by the laws of such State to conduct investigations, administer oaths and affirmations, or compel the attendance of witnesses or the production of documentary and other evidence. (d) Private right of action (1) In general A person injured by an act or practice in violation of a regulation promulgated under section 4 may bring in an appropriate State court or an appropriate district court of the United States— (A) an action to enjoin the violation; (B) an action to recover damages for actual monetary loss from the violation, or to receive up to $10,000 in damages for each such violation, whichever is greater