Section 28(1) in The Railways (Opening for Public Carriage of Passengers) Rules, 2000
(1)The Research, Design and Standards Organisation shall apply, for introduction of new types of locomotives or rolling stock different from those already running on any section or division of railway administrations for use by any railway administration, to the Central Government through the Commissioner.Explanation. - For the purposes to this rule, any increase in sanctioned maximum speed of existing locomotives or rolling stock shall be treated as introduction of new types of locomotives or rolling stock.
