(1) When a Loco pilot finds an Intermediate Block Stop signal at 'ON', he shall stop his train in rear of the signal and contact the Station Master on duty of the block section in rear on telephone provided on the signal post or either of approved or secured means of communications, and take his permission before passing beyond it.
(2) The Station Master shall authorise the Loco pilot to pass the Intermediate Block Stop signal at 'ON' only after taking line clear from the block station in advance.
(3) If the Loco pilot is unable to contact the Station Master on duty of the block section in rear, he shall after waiting for five minutes at the signals shall pass the Intermediate Block Stop signal at ‘ON’ and proceed cautiously into the block section ahead and be prepared to stop short of any obstruction, at a speed not exceeding fifteen kilo meter per hour, if he has a good view of the line ahead, otherwise at a speed not exceeding eight kilo meter per hour and report the failure to the Station Master on duty at the block station ahead.
(4) The Station Master of the block station controlling the Intermediate Block Stop signal on becoming aware that such a signal is defective shall, before despatching a train, after ensuring that there is no train upto the next block station, may treat the entire section upto the next block station immediately ahead of the Intermediate Block Stop signal as one block section and issue authority to the Loco pilot to pass both Advanced Starter signal and Intermediate Block Stop signal at ‘ON’, after taking line clear under condition of failure of block instrument in terms of rule 217.