Section 219(4) in The Dedicated Freight Corridor Railway General Rules, 2018
(4)In case of automatic block signalling territory, provided with a modified semi automatic Stop signal in mid section, and when it has been decided to run trains with 'A' marker extinguished as provided for in sub- rule (2) of rule 105 and sub- rule (2) of the rule 107, the caution order issued to the Loco pilot shall specifically mention the exact location of the modified semi automatic signal in mid section, giving its distinguishing number, and that no fog signalling arrangement are being provided ahead of the same.Provided, however, that when trains are being worked in this manner fog signalling of home signal shall be done as per sub-rule (1) of rule 219.
