---
kind: "section"
citation: "40 C.F.R. § 1045.107"
title: "40"
number: "1045.107"
heading: "What are the not-to-exceed emission standards?"
url: "https://uscodex.org/cfr/40/1045.107"
---

# §1045.107. What are the not-to-exceed emission standards?


Not-to-exceed emission standards apply as follows:

- (a) **Measure emissions using the not-to-exceed procedures in subpart F of this part—**
- (b) Determine the not-to-exceed standard, rounded to the same number of decimal places as the emission standard in Table 1 to this section from the following equation:
- (c) For engines equipped with a catalyst, use NTE multipliers from the following table across the applicable zone specified in [§ 1045.515](/cfr/40/1045.515.md):
- (d) For two-stroke engines not equipped with a catalyst, use an NTE multiplier of 1.2 for HC + NOX and CO. Compare the weighted value specified in [§ 1045.515(c)(5)](/cfr/40/1045.515.md?p=c-5) to the NTE standards specified in [paragraph (b)](#b) of this section.
- (e) For engines not covered by paragraphs [(c)](#c) and [(d)](#d) of this section, use the NTE multipliers from the following table across the applicable zone specified in [§ 1045.515](/cfr/40/1045.515.md):

## Notes

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 73 FR 59194, Oct. 8, 2008, unless otherwise noted.