[Code of Federal Regulations] [Title 49, Volume 5] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR553.21] [Page 137-138] TITLE 49--TRANSPORTATION CHAPTER V--NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 553_RULEMAKING PROCEDURES--Table of Contents Subpart B_Procedures for Adoption of Rules Sec. 553.21 Contents of written comments. All written comments shall be in English. Unless otherwise specified in a [[Page 138]] notice requesting comments, comments may not exceed 15 pages in length, but necessary attachments may be appended to the submission without regard to the 15-page limit. Any interested person shall submit as a part of his written comments all material that he considers relevant to any statement of fact made by him. Incorporation by reference should be avoided. However, if incorporation by reference is necessary, the incorporated material shall be identified with respect to document and page. It is requested, but not required, that 10 copies and attachments, if any, be submitted.