Competent Workers must not do other work when protecting the Active Control Level
Crossing.
If one Competent Worker cannot safely protect an Active Control Level Crossing,
additional Competent Workers must be used.
Competent Workers must leave functional Warning equipment in operation unless
Authorised by the Train Controller.
Competent Workers may switch off Warning equipment only after they have received
the Train Controller’s confirmation that no Rail Traffic is Closely Approaching.