---
kind: "section"
citation: "40 C.F.R. § 1030.35"
title: "40"
number: "1030.35"
heading: "Change criteria."
url: "https://uscodex.org/cfr/40/1030.35"
---

# §1030.35. Change criteria.

- (a) For an airplane that has demonstrated compliance with [§ 1030.30](/cfr/40/1030.30.md), any subsequent version of that airplane must demonstrate compliance with [§ 1030.30](/cfr/40/1030.30.md) if the subsequent version incorporates a modification that either increases—
  - (1) The maximum takeoff mass; or
  - (2) **The fuel efficiency metric value by more than—**
    - (i) For airplanes with a MTOM greater than or equal to 5,700 kg, the value decreases linearly from 1.35 to 0.75 percent for an airplane with a MTOM of 60,000 kg.
    - (ii) For airplanes with a MTOM greater than or equal to 60,000 kg, the value decreases linearly from 0.75 to 0.70 percent for airplanes with a MTOM of 600,000 kg.
    - (iii) For airplanes with a MTOM greater than or equal to 600,000 kg, the value is 0.70 percent.
- (b) For an airplane that has demonstrated compliance with [§ 1030.30](/cfr/40/1030.30.md), any subsequent version of that airplane that incorporates modifications that do not increase the MTOM or the fuel efficiency metric value in excess of the levels shown in [paragraph (a)](#a) of this section, the fuel efficiency metric value of the modified airplane may be reported to be the same as the value of the prior version.
- (c) For an airplane that meets the criteria of § [1030.1(a)(4)](/cfr/40/1030.1.md?p=a-4) or [(5)](/cfr/40/1030.1.md?p=a-5), after January 1, 2023 and until January 1, 2028, the airplane must demonstrate compliance with [§ 1030.30](/cfr/40/1030.30.md) if it incorporates any modification that increases the fuel efficiency metric value by more than 1.5 per cent from the prior version of the airplane.

## Notes

### Authority

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

### Source

Source: 86 FR 2171, Jan. 11, 2021, unless otherwise noted.