In an action under this section, the Administrator of the Environmental Protection Agency, if not a party, may intervene as a matter of right. In an action under this section respecting a noise control requirement under section 44715 of title 49, the Administrator of the Federal Aviation Administration, if not a party, may also intervene as a matter of right.
42 U.S. Code § 4911 - Citizen suits
In subsecs. (a)(2)(B), (b)(1)(A), (c), and (f), “section 44715 of title 49” substituted for “section 611 of the Federal Aviation Act of 1958” and “such section 611” on authority of Pub. L. 103–272, § 6(b), July 5, 1994, 108 Stat. 1378, the first section of which enacted subtitles II, III, and V to X of Title 49, Transportation.