[Code of Federal Regulations] [Title 49, Volume 5] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR537.10] [Page 105-106] TITLE 49--TRANSPORTATION OF TRANSPORTATION PART 537--AUTOMOTIVE FUEL ECONOMY REPORTS--Table of Contents Sec. 537.10 Incorporation by reference. (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 [[Page 106]] 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.