(1) The minimum equipment of signals at a station for each direction, shall be a manually operated Home, a manually operated starter signal for each running line, and a manually operated advanced starter where more than one running line exists.
(2) The equipment of signals in the block section between two block stations for each direction shall be, an automatic Stop signal in rear of Home signal of the station and when required, one or more automatic Stop or semi-automatic Stop signals; out of which one may be a modified semi-automatic Stop signal; Under special instructions the Automatic Stop signal may be dispensed with if the distance between last Stop and first Stop signals is less than one thousand meters.
(3) In addition, such other fixed signals and boards as may be necessary for the safe working of trains may be provided.
(4) Where under special instructions, when one of the automatic or semi-automatic Stop signal in mid-section between two block stations has been modified to work as modified semi-automatic Stop signal, it shall be provided and worked in accordance with sub-rule
(2) of the rule 105, except that adequate distance referred to in sub-clause (c) of sub-rule
(2) of the rule 105 shall be one hundred eighty meters instead of one hundred twenty meters given therein.
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