40 CFR § 63.10384 - What are my compliance dates?
---
identifier: "/us/cfr/t40/s63.10384"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.10384 - What are my compliance dates?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.10384"
section_name: "What are my compliance dates?"
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"
---
# 63.10384 What are my compliance dates?
(a) *Existing source.* If you have an existing affected source, you must comply with applicable requirements in this subpart no later than December 29, 2008.
(b) *New source.* If you start up a new affected source on or before December 28, 2007, you must comply with applicable requirements in this subpart by December 28, 2007.
(c) *New source.* If you start up a new affected source after December 28, 2007, you must comply with applicable requirements in this subpart upon startup of your affected source.