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§ 63.9305 What are my general requirements for complying with this subpart?
(a) Prior to December 1, 2020, you must be in compliance with the emission limitation that applies to you at all times, except during periods of startup, shutdown, or malfunction (SSM) of your control device or associated monitoring equipment. On and after December 1, 2020, you must be in compliance with the applicable emission limitation at all times.