Section 199(1)(b) in The Dedicated Freight Corridor Railway General Rules, 2018
(b)in case of working of material or departmental train in station section, the lines for which block is taken, shall be treated as deemed `obstructions' for the purpose of taking 'off' signals or train working or shunting. The affected line shall be protected by setting the points against such line and stop plugs placed over the relevant point switches or buttons. Buzzer where provided shall also be switched 'on',