A. First Named Point
When a station name designates the first named point, authority extends from and includes the last siding switch. Authority extends from the station sign if no siding exists.
B. Last Named Point
When a station name designates the last named point, authority extends to and includes the first siding switch. Authority extends to the station sign if no siding exists.
A track warrant must not be issued to protect men or equipment within the same or overlapping limits with a train unless:
A. Transmitting Track Warrants
Time Limit Shown
If the track warrant shows a time limit, the train must clear the limits by the time specified, unless another track warrant is obtained. If the crew members cannot contact the train dispatcher and time limits expire, authority is extended until the train dispatcher can be contacted.
When the limits or instructions of a track warrant must be changed, a new track warrant must be issued showing, "Track Warrant NO.____________ is void" and the number of the track warrant being changed. When a track warrant of a previous date is voided, the date must be included. The previous track warrant will no longer be in effect.
Track warrants that restrict the authority or movement of a train must not be transmitted mechanically, unless the train being restricted will not leave the point without receiving the track warrant.