CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 200–269) > PART 235—INSTRUCTIONS GOVERNING APPLICATIONS FOR APPROVAL OF A DISCONTINUANCE OR MATERIAL MODIFICATION OF A SIGNAL SYSTEM OR RELIEF FROM THE REQUIREMENTS OF PART 236 > 235.5—Changes requiring filing of application.

235.5—Changes requiring filing of application.

(a) Except as provided in § 235.7, applications shall be filed to cover the following:
(1) The discontinuance of a block signal system, interlocking, traffic control system, automatic train stop, train control, or cab signal system or other similar appliance or device;
(2) The decrease of the limits of a block signal system, interlocking, traffic control system, automatic train stop, train control, or cab signal system; or
(3) The modification of a block signal system, interlocking, traffic control system, automatic train stop, train control, or cab signal system.
(b) [Reserved]
(Approved by the Office of Management and Budget under control number 2130-0042)