StacksVerified U.S. regulatory reference

40 CFR §63.9796

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
You must conduct performance tests within 180 calendar days after the compliance date that is specified for your source in § 63.9786 and according to the provisions in § 63.7(a)(2).