Title 49: Transportation
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
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§ 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)
