U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

§ 63.5540 - By what date must I conduct a performance test or other initial compliance demonstration?

(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).