40 CFR § 610.25 - Evaluation of test data.

---
identifier: "/us/cfr/t40/s610.25"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 610.25 - Evaluation of test data."
title_number: 40
title_name: "Protection of Environment"
section_number: "610.25"
section_name: "Evaluation of test data."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "Q"
subchapter_name: "ENERGY POLICY"
part_number: "610"
part_name: "FUEL ECONOMY RETROFIT DEVICES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Sec. 511, Motor Vehicle Information and Cost Savings Act, as amended (sec. 301, Pub. L. 94-163, 89 Stat. 915 (15 U.S.C. 2011))."
regulatory_source: "44 FR 17946, Mar. 23, 1979, unless otherwise noted."
cfr_part: "610"
---


# 610.25 Evaluation of test data.

Valid manufacturer-furnished test data will be evaluated with respect to:

(a) Vehicle applicability;

(b) Dependence of device effects upon vehicle type;

(c) Device effects on fuel economy, and on emissions, with statistical or other caveats as established by the data base;

(d) Definition of claims which can be made based on the available data; and

(e) Substantiation of specified claims made by the manufacturer.