---
kind: "section"
citation: "40 C.F.R. § 63.5425"
title: "40"
number: "63.5425"
heading: "When must I start recordkeeping to determine my compliance ratio?"
url: "https://uscodex.org/cfr/40/63.5425"
---

# §63.5425. When must I start recordkeeping to determine my compliance ratio?

- (a) If you have a new or reconstructed affected source, you must start recordkeeping to determine your compliance ratio according to one of the schedules listed in paragraphs [(a)(1)](#a-1) and [(2)](#a-2) of this section:
  - (1) If the startup of your new or reconstructed affected source is before February 27, 2002, then you must start recordkeeping to determine your compliance ratio no later than February 27, 2002.
  - (2) If the startup of your new or reconstructed affected source is after February 27, 2002, then you must start recordkeeping to determine your compliance ratio upon startup of your affected source.
- (b) If you have an existing affected source, you must start recordkeeping to determine your compliance ratio no later than February 27, 2004.
- (c) If you have a source that becomes a major source of HAP emissions after February 27, 2002, then you must start recordkeeping to determine your compliance ratio immediately upon submitting your Initial Notification, as required at [§ 63.5415(g)](/cfr/40/63.5415.md?p=g).

## Notes

### Source

Source: 67 FR 9162, Feb. 27, 2002, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.