40 CFR § 63.9924
How do I demonstrate continuous compliance with the operation and maintenance requirements that apply to me?
June 9, 2020
For each emission point subject to an emission limit in Table 1 to this subpart, you must demonstrate continuous compliance with the operation and maintenance requirements in §63.9900 by performing preventive maintenance for each control device according to §63.9900(b) and recording all information needed to document conformance with these requirements.