(a) Before November 12, 2024, 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. On or after November 12, 2024, you must be in compliance with the emission limitations, work practice standards, design standards, and operation and maintenance requirements in this subpart at all times.

(b) During the period between the compliance date specified for your affected source in § 63.1443, and the date upon which continuous monitoring systems have been installed and certified and any applicable operating limits have been set, you must maintain a log detailing the operation and maintenance of the process and emissions control equipment.

(c) Before November 12, 2024, you must develop a written startup, shutdown, and malfunction plan according to the provisions in § 63.6(e)(3). For affected sources, a startup, shutdown, and malfunction plan is not required on or after November 12, 2024.