; (B) upon so intervening, to be heard on all matters arising therein; and (C) to file petitions for appeal. (3) Limitation on State action while Federal action is pending If the Commission has instituted a civil action for violation of section 2(c) or 3 (including a rule prescribed under such section), no State attorney general may bring an action under this subsection during the pendency of that action against any defendant named in the complaint of the Commission for any violation of such section (including such rule) alleged in the complaint. (4) Attorney general defined In this subsection, the term attorney general means, with respect to a State, the attorney general or chief law enforcement officer of the State, or another official or agency designated by the State to bring civil actions on behalf of the State or the residents of the State. (c) Rulemaking The Commission may prescribe rules under section 553 of title 5, United States Code, to implement sections 2(c) and 3. (d) Preservation of authority of Commission Nothing in this Act shall be construed in any way to limit or affect the authority of the Commission under any other provision of law. 5. Gambling addiction prevention and treatment (a) Authority To address gambling in Department of Health and Human Services authorities Section 501(d) of the Public Health Service Act ( 42 U.S.C. 290aa(d) ) is amended— (1) by striking and at the end of paragraph (24); (2) by striking the period at the end of paragraph (25) and inserting ; and