40 CFR § 63.9910 - What are my general requirements for complying with this subpart?
---
identifier: "/us/cfr/t40/s63.9910"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.9910 - What are my general requirements for complying with this subpart?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.9910"
section_name: "What are my general requirements for complying with this subpart?"
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"
---
# 63.9910 What are my general requirements for complying with this subpart?
(a) You must be in compliance with the emission limitations, work practice standards, and operation and maintenance requirements in this subpart at all times, except during periods of startup, shutdown, and malfunction as defined in § 63.2.
(b) You must develop a written startup, shutdown, and malfunction plan according to the provisions in § 63.6(e)(3).
[68 FR 58620, Oct. 10, 2003, as amended at 71 FR 20471, Apr. 20, 2006]