40 CFR § 63.2261 - By what date must I conduct performance tests or other initial compliance demonstrations?

---
identifier: "/us/cfr/t40/s63.2261"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.2261 - By what date must I conduct performance tests or other initial compliance demonstrations?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.2261"
section_name: "By what date must I conduct performance tests or other initial compliance demonstrations?"
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: "2026-03-24"
last_updated: "2026-03-24"
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"
---


# 63.2261 By what date must I conduct performance tests or other initial compliance demonstrations?

(a) You must conduct performance tests upon initial startup or no later than 180 calendar days after the compliance date that is specified for your source in § 63.2233 and according to § 63.7(a)(2), whichever is later.

(b) You must conduct initial compliance demonstrations that do not require performance tests upon initial startup or no later than 30 calendar days after the compliance date that is specified for your source in § 63.2233, whichever is later.