Railways Act, 1989
3. Zonal Railways.
(1) The Central Government may, for the purpose of the efficient administration of the Government railways, by notification, constitute such railways into as many Zonal Railways as it may deem fit and specify in such notification the names and headquarters of such Zonal Railways and the areas in respect of which they shall exercise jurisdiction.
(2) The Zonal Railway existing immediately before the commencement of this Act shall be deemed to be Zonal Railways constituted under sub-section (1).
(3) The Central Government may, by notification, declare any unit of the railways engaged in research, development designing,, construction or production of rolling stock, its parts or, other equipment used on a railway, to be a Zonal Railway.
(4) The Central Government may, by notification, abolish any Zonal Railway or constitute any new Zonal Railway out of any existing Zonal Railway or Zonal Railways, change the name or headquarters of any Zonal Railway or determine the areas in respect of which a Zonal Railway shall exercise jurisdiction.