(1) For the signalling of train operation, the prescribed code of bell signals, as detailed below, shall be used and exhibited in each block station near the place of operation of the block working equipment.
¹Hkkx IIµ[k.M 3(i)º Hkkjr dk jkti=k % vlk/kj.k 193 Note: (a) '0' INDICATES A STROKE OR A BEAT OF BELL.
(b) EACH SIGNAL SHALL BE GIVEN SLOWLY AND DISTINCTLY.
(2) Provided further that exchange of bell codes under item 3 and 4 are not required between stations provided with block proving axle counter or track circuit having complete track circuiting of station yard excluding non-running lines on either end.
(3) Unless otherwise specified, it shall be mandatory to use the authorised code of bell signals along with attached telephone when operating block instrument.