---
kind: "section"
citation: "40 C.F.R. § 63.5983"
title: "40"
number: "63.5983"
heading: "When do I have to comply with this subpart?"
url: "https://uscodex.org/cfr/40/63.5983"
---

# §63.5983. When do I have to comply with this subpart?

- (a) If you have a new or reconstructed affected source, except as provided in §§ [63.5982(b)(4)](/cfr/40/63.5982.md?p=b-4) and [63.5981(b)(1)](/cfr/40/63.5981.md?p=b-1), you must comply with the emission limitations for new and reconstructed sources in this subpart upon startup.
- (b) If you have an existing affected source, you must comply with the emission limitations for existing sources no later than July 11, 2005.
- (c) If you have an area source that increases its emissions or its potential to emit such that it becomes a major source of HAP, the affected source(s) must be in compliance with existing source emission limitations no later than 3 years after the date on which the area source became a major source.
- (d) You must meet the notification requirements in [§ 63.6009](/cfr/40/63.6009.md) according to the schedule in [§ 63.6009](/cfr/40/63.6009.md) and in [subpart A](/cfr/40/subpartA.md) of this part. Some of the notifications must be submitted before the date you are required to comply with the emission limitations in this subpart.

## Notes

### Amendments

[67 FR 45598, July 9, 2002, as amended at 89 FR 94907, Nov. 29, 2024; 91 FR 37276, June 22, 2026]

### Source

Source: 67 FR 45598, July 9, 2002, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[67 FR 45598, July 9, 2002, as amended at 89 FR 94907, Nov. 29, 2024; 91 FR 37276, June 22, 2026]