PUSHING BACK GR-4.12(SR 4.12-1)
In general Engine must draw a Train except under the following exceptions
1. When within station limits, or where specially authorized.
2. Under special instructions when used as an assisting engine.
3. When it is necessary for train to push back to the station from which it entered the section under the instructions laid down in SR 4.12-2
4. In case of disabled train or accident a following engine may push the train or vehicle slowly to the next siding or to the first station or cabin at which the engine can be transferred to the front of the train.
