; and (II) a copy of the complaint for that action. (ii) Exemption (I) In general Clause (i) shall not apply with respect to the filing of an action by an attorney general of a State under this paragraph if the attorney general determines that it is not feasible to provide the notice described in that clause before the filing of the action. (II) Notification In an action described in subclause (I), the attorney general of a State shall provide notice and a copy of the complaint to the Commission at the same time as the attorney general files the action. (2) Intervention (A) In general On receiving notice under paragraph (1)(B), the Commission shall have the right to intervene in the action that is the subject of the notice. (B) Effect of intervention If the Commission intervenes in an action under paragraph (1), it shall have the right— (i) to be heard with respect to any matter that arises in that action; and (ii) to file a petition for appeal. (3) Construction For purposes of bringing any civil action under paragraph (1), nothing in this Act shall be construed to prevent an attorney general of a State from exercising the powers conferred on the attorney general by the laws of that State to— (A) conduct investigations; (B) administer oaths or affirmations; or (C) compel the attendance of witnesses or the production of documentary and other evidence. (4) Actions by the Commission In any case in which an action is instituted by or on behalf of the Commission for violation of this Act or a regulation prescribed under this Act, no State may, during the pendency of that action, institute an action under paragraph (1) against any defendant named in the complaint in the action instituted by or on behalf of the Commission for that violation. (5) Venue