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

---
identifier: "/us/cfr/t40/s63.5540"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.5540 - By what date must I conduct a performance test or other initial compliance demonstration?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.5540"
section_name: "By what date must I conduct a performance test or other initial compliance demonstration?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "63"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "57 FR 61992, Dec. 29, 1992, unless otherwise noted."
cfr_part: "63"
---


# 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).