Clarifies definitions of modifications and constructions under the Clean Air Act.

The New Source Review Permitting Improvement Act amends the Clean Air Act to clarify when a physical change or operational change in a stationary source constitutes a modification or construction. It specifies that a modification does not include a change that does not result in a significant emissions increase. The bill also amends the definition of modifications and modified for nonattainment areas and for prevention of significant deterioration. The changes aim to ensure that only significant changes that increase emissions are considered modifications.

Clarifies definitions of modifications and constructions under the Clean Air Act.

The New Source Review Permitting Improvement Act amends the Clean Air Act to clarify when a physical change or operational change in a stationary source constitutes a modification or construction. It specifies that a modification does not include a change that does not result in a significant emissions increase. The bill also amends the definition of modifications and modified for nonattainment areas and for prevention of significant deterioration. The changes aim to ensure that only significant changes that increase emissions are considered modifications.