Paragraph 19 Conditions and requirements to be observed

If the white light mentioned in paragraph 11 shows and the crossing is unobstructed, drivers of trains may drive their trains towards and over the crossing at a speed not exceeding the speed indicated on the relevant board described in paragraph 12 from the point at which the board is located until the front of the train has passed over the crossing. If the intermittent red light shows or the white light does not show or the crossing is obstructed at the time the white light is showing, drivers of trains shall bring their trains to a stand short of the crossing and may thereafter proceed with caution when it is safe to do so.