---
kind: "section"
citation: "40 C.F.R. § 63.10681"
title: "40"
number: "63.10681"
heading: "What are my compliance dates?"
url: "https://uscodex.org/cfr/40/63.10681"
---

# §63.10681. What are my compliance dates?

- (a) Except as provided in [paragraph (b)](#b) of this section, if you own or operate an existing affected source, you must achieve compliance with the applicable provisions of this subpart by no later than June 30, 2008.
- (b) If you own or operate an existing affected source, you must achieve compliance with opacity limit in § [63.10686(b)(2)](/cfr/40/63.10686.md?p=b-2) or [(c)(2)](/cfr/40/63.10686.md?p=c-2) by no later than December 28, 2010 if you demonstrate to the satisfaction of the permitting authority that additional time is needed to install or modify emission control equipment.
- (c) If you start up a new affected source on or before December 28, 2007, you must achieve compliance with the applicable provisions of this subpart by no later than December 28, 2007.
- (d) If you start up a new affected source after December 28, 2007, you must achieve compliance with the applicable provisions of this subpart upon startup of your affected source.

## Notes

### Source

Source: 72 FR 74111, Dec. 28, 2007, unless otherwise noted.

### Authority

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

### Source

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