; and (ii) upon intervening— (I) be heard on all matters arising in the civil action; and (II) file petitions for appeal of a decision in the civil action. (3) Investigatory powers For purposes of bringing any civil action under paragraph (1), nothing in this title 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) Preemptive action by Federal Trade Commission If the Federal Trade Commission institutes a civil action or an administrative action with respect to a violation of this title, the attorney general of a State may not, during the pendency of such action, bring a civil action under paragraph (1) against any defendant named in the complaint of the Commission for the violation with respect to which the Commission instituted such action. (5) Venue; service of process (A) Venue Any action brought under paragraph (1) may be brought in the district court of the United States that meets applicable requirements relating to venue under section 1391 of title 28, United States Code. (B) Service of process In an action brought under paragraph (1), process may be served in any district in which the defendant— (i) is an inhabitant