(1) A train shall not work at night or in bad weather conditions impairing visibility or in long tunnels, unless the locomotive carries in the front an electric head light of an approved design, two electric white marker lights, one flasher light on top in the front; and two red marker lights in the rear for use during light running.
(2) A locomotive employed exclusively on shunting at stations and yards shall, at night or in bad weather conditions impairing visibility, display such head lights as are prescribed by the special instructions and exhibit two red marker lights in front and in rear.
(3) The electric head light shall be fitted with a switch to dim the light and shall be dimmed, -
(a) When the train remains stationary at a station;
(b) when the train is approaching another train which is running in opposite direction on double or multiple track; and
(c) On such other occasions as may be prescribed by special instructions.
(4) In case the electric head light fails enroute or a train has to be worked without headlight in an emergency, the locomotive shall display two electric white marker lights referred to in sub- rule (1) of the rule 161 pointing in the direction of movement and the train shall run at a speed not exceeding fifty kilometre per hour or severest speed restriction imposed in the section whichever is less to reach the location where the problem can either be rectified or a relief locomotive is provided.
(5) Locomotive shall not be turned out from the shed if head Light, marker lights and flasher lights are in defective condition. In case of flasher light is found defective enroute the loco pilot shall inform the controller to make arrangement for rectification or arrange a relief locomotive.
In the mean time before reaching the location where the problem can be rectified in case the train is stopped on account of accident or any other cause besides showing danger signals towards the direction from which the train shall be approaching, he shall instead repeatedly switch ‘on’ or switch ‘off’, the head light of his locomotive till his train meets first train from opposite direction and also make use of the approved means of communications to warn the Loco pilot of any approaching train.
(6) Locomotive shall not be turned out from the shed if speedometer or recorder are in defective condition. In case of speedometer or recorder becoming defective during run, the Loco pilot should estimate the speed of his train either from the number of posts passed in an interval in electrified territory or otherwise so as not to exceed the ninety per cent of the maximum permissible speed of that section or the train whichever is less.