2. If it be necessary to proceed with Caution, the Green Flag will be elevated, thus:—
3. If it be necessary to proceed with Caution from any defect in the rails, the Green Flag will be depressed, thus:—
4. If required to stop, the Red Flag will be shown and waved to and fro, the Policeman facing the Engine.
5. Engine-Drivers must invariably stop on seeing the Red Signal.
6. As soon as the Engine passes, the Policeman will bring his flag to the shoulder.
7. Every Policeman will be responsible for having his Hand Lamp in good order and properly trimmed.