---
kind: "section"
citation: "40 C.F.R. § 63.4150"
title: "40"
number: "63.4150"
heading: "By what date must I conduct the initial compliance demonstration?"
url: "https://uscodex.org/cfr/40/63.4150"
---

# §63.4150. By what date must I conduct the initial compliance demonstration?


You must complete the initial compliance demonstration for the initial compliance period according to the requirements of [§ 63.4151](/cfr/40/63.4151.md). The initial compliance period begins on the applicable compliance date specified in [§ 63.4083](/cfr/40/63.4083.md) and ends on the last day of the first full month after the compliance date. If the compliance date occurs on any day other than the first day of a month, then the initial compliance period extends through the end of that month plus the next month. The initial compliance demonstration includes the calculations according to [§ 63.4151](/cfr/40/63.4151.md) and supporting documentation showing that the organic HAP emission rate for the initial compliance period was equal to or less than the applicable emission limit in [§ 63.4090](/cfr/40/63.4090.md).


## Notes

### Source

Source: 67 FR 48262, July 23, 2002, unless otherwise noted.

### Authority

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

### Source

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