StacksVerified U.S. regulatory reference

40 CFR §63.5540

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)You must conduct performance tests or other initial compliance demonstrations no later than 180 calendar days after the compliance date that is specified for your source in § 63.5495 and according to the provisions in § 63.7(a)(2).