Section 229(1)(a) in The Dedicated Freight Corridor Railway General Rules, 2018
(a)In case of an accident resulting in complete blocking of running lines, if it is considered necessary to run train or trains to the site of the accident for relief or other purposes, such trains may be despatched into the obstructed section by issuing a written authority to proceed without line clear 'Authority to Proceed Without Line Clear' to the Loco pilots of such trains on the prescribed form;