40 C.F.R. § 60.5725b
In lieu of a State plan submittal, are there other acceptable option(s) for a State to meet its CAA section 111(d) obligations?
Cite as 40 C.F.R. § 60.5725b (2026)
A State may meet its CAA section 111(d) obligations only by submitting a State plan or a negative declaration letter (if applicable).