Section 201(5)(c) in The Dedicated Freight Corridor Railway General Rules, 2018
(c)in case of working of tower wagon in block section,-(i)The tower wagon shall be despatched from the station in rear only after blocking back or blocking forward the block section along with necessary authority for shunting or obstruction as in rule 103 and the requisite caution order is given;(ii)if the work necessitates stopping of trains on any of the adjacent line, block for the same shall be asked for by the supervisor and the affected section shall also be blocked back or blocked forward by the station master despatching the train; and(iii)if the nature of work is such that train movement need not be stopped on the adjoining line but infringement is apprehended during operation of the machine, the supervisor shall arrange to show signals in accordance with the rule 242 and loco pilot of trains proceeding into the section shall be issued caution order by station master at either end of the section.