49 CFR § 537.10 - Incorporation by reference by manufacturers.
---
identifier: "/us/cfr/t49/s537.10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 537.10 - Incorporation by reference by manufacturers."
title_number: 49
title_name: "Transportation"
section_number: "537.10"
section_name: "Incorporation by reference by manufacturers."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "537"
part_name: "AUTOMOTIVE FUEL ECONOMY REPORTS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 32907; delegation of authority at 49 CFR 1.95."
regulatory_source: "87 FR 26087, May 2, 2022, unless otherwise noted."
cfr_part: "537"
---
# 537.10 Incorporation by reference by manufacturers.
(a) A manufacturer may incorporate by reference in a report required by this part any document other than a report, petition, or application, or portion thereof submitted to any Federal department or agency more than two model years before the current model year.
(b) A manufacturer that incorporates by references a document not previously submitted to the National Highway Traffic Safety Administration shall append that document to the report.
(c) A manufacturer that incorporates by reference a document shall clearly identify the document and, in the case of a document previously submitted to the National Highway Traffic Safety Administration, indicate the date on which and the person by whom the document was submitted to this agency.