[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR201.7] [Page 10] TITLE 49--TRANSPORTATION CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 201_FORMAL RULES OF PRACTICE FOR PASSENGER SERVICE--Table of Contents Sec. 201.7 Notification by interested persons. Any person desiring to participate as a party shall notify the Administrator, by registered or certified mail, on or before the date specified in the notice.