Modifies section 209 of the Clean Air Act by striking subsection (b); striking the last sentence of subsection (c); redesignating subsections (c) and (d) as (b) and (c), respectively; and striking subsection (e) and inserting a new subsection (d) that prohibits States from adopting or enforcing standards relating to emissions from specified nonroad engines and nonroad vehicles (including new construction and farm engines/vehicles and new locomotives or engines used in locomotives).

Amends the matter preceding clause (i) in the first sentence of 202(i)(2)(A) by striking specified text (exact text to be struck is not provided in this section).

Makes multiple targeted amendments to section 211: strikes certain subparagraphs and clauses in subsection (c)(4) (removing subparagraph (B), adjusting numbering), strikes specified text in subsection (k)(1)(B)(ii), and strikes and redesignates specified subparagraphs in subsection (o)(6). Exact textual elements struck are identified in the bill (some are shown here as strike directives).

Amends section 241(2) by striking a portion of the second sentence (the bill text indicates removal of text 'and all that follows through' a specified point).

Amends section 242(b) by striking specified text each place it appears (the bill indicates multiple deletions of the targeted text within subsection (b)).

Amends section 243 by striking subsections (e), (f), and (g).

Repeals section 244 of the Clean Air Act (42 U.S.C. 7584).

Amends section 247(b) by striking the phrase 'section 242, 243, 244,' in the second sentence and inserting 'sections 242, 243,' (thereby removing the reference to section 244).

Repeals Section 177 of the Clean Air Act (42 U.S.C. 7507).

Amends 42 U.S.C. 7589(e)(3) by striking the second sentence of that subsection.