40 CFR § 610.24 - Validity of test data.

---
identifier: "/us/cfr/t40/s610.24"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 610.24 - Validity of test data."
title_number: 40
title_name: "Protection of Environment"
section_number: "610.24"
section_name: "Validity 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: "2026-03-24"
last_updated: "2026-03-24"
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"
---


# 610.24 Validity of test data.

The Administrator will make a determination as to the validity of manufacturer-furnished test data on the basis of:

(a) The correlation between the test procedures used by the manufacturer or testing agent and the procedures prescribed in subpart D;

(b) The choice of test vehicle(s) as representative of the manufacturer's claim for operation and/or principles of operation;

(c) The degree of control exercised over ambient and operating conditions in the tests, including vehicle calibrations;

(d) Accuracy and precision of the measurement techniques and instrumentation used in the tests;

(e) Disclosure of all test data acquired on the device, whether representing positive, negative, or inconclusive results;

(f) Qualifications and independence of the testing agent; and

(g) The extent to which test data include evaluation of the durability of the device, or its effect on vehicle durability.