B. Conditions and Requirements to be observed by the Operator.
32. Drivers shall bring their trains to a halt at the stop boards mentioned in paragraph 20 above. Trains travelling in either direction shall not proceed over the crossing until the intermittent white light of the driver’s indicator mentioned in paragraph 21 above shows. If the white light fails to show, drivers shall proceed with caution when it is safe to do so after they have brought their trains to a stand short of the crossing.