---
kind: "section"
citation: "49 C.F.R. § 235.5"
title: "49"
number: "235.5"
heading: "Changes requiring filing of application."
url: "https://uscodex.org/cfr/49/235.5"
---

# §235.5. Changes requiring filing of application.

- (a) Except as provided in [§ 235.7](/cfr/49/235.7.md), 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]

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 49 FR 3380, Jan. 26, 1984, unless otherwise noted.