An approved means of communication along with its back up of type as in sub-rule (2) of the rule 90 except clause (a) thereof shall be provided at every station.
130. Certificate of competency- (1) No person shall operate communication instrument, panel or Route relay interlocking or Solid state interlocking or similar such device until he has passed a test in the operation of the same and unless he holds a certificate of competency granted by an authority appointed in this behalf by Dedicated Freight Corridor Railway administration.
(2) The certificate of competency referred to in sub-rule- (1) of rule 130 shall only be valid for a period of three years or such longer period as may be laid down by special instructions.
131. Block back or Block forward-(1) Whenever it is necessary to provide block protection prescribed by these rules or is dictated by itself in the interest of safety of trains and men, Station Master on duty shall block back or block forward the block section under exchange of private number message after confirming from the Station Master at other end that the block section is clear of all trains after tallying the train number of the last train.
(2) All dispatch signals have been put back to 'ON'.
(3) An entry to this effect shall also be made in the Train signal register.
(4) In addition to switching 'ON' of the buzzer alarm where provided, prescribed collars shall be put on the buttons operating the dispatch signals.