The running of every train shall, in its progress from one block station to another, shall be regulated automatically by means of Track circuits or Axle counters and Automatic Stop signals described in rule 105 and 107 and there is no need to take Line Clear under normal conditions.
However, Line Clear shall have to be taken through one of the approved means of communication given in sub-rule (2) of rule 90 for establishing direction in single line, before dispatching a train from a station during suspension of automatic signalling or temporary single line working, or in any other situation that may be prescribed by special instruction; Message shall also be exchanged for shunting or obstruction in the block section.