40 CFR § 63.5840 - By what date must I conduct a performance test or other initial compliance demonstration?
---
identifier: "/us/cfr/t40/s63.5840"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.5840 - By what date must I conduct a performance test or other initial compliance demonstration?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.5840"
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: "2026-03-24"
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"
---
# 63.5840 By what date must I conduct a performance test or other initial compliance demonstration?
You must conduct performance tests, performance evaluations, design evaluations, capture efficiency testing, and other initial compliance demonstrations by the compliance date specified in Table 2 to this subpart, with three exceptions. Open molding and centrifugal casting operations that elect to meet an organic HAP emissions limit on a 12-month rolling average must initiate collection of the required data on the compliance date, and demonstrate compliance 1 year after the compliance date. New sources that use add-on controls to initially meet compliance must demonstrate compliance within 180 days after their compliance date.