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(c) The application shall be scrutinized by the Commissioner and his
recommendations thereon shall be submitted to the Central Government for
its orders.

(d) No new type of engine or rolling stock which would cause stresses
exceeding those specified in the IRS Bridge Rules, 1964, or the Standard
Codes of Practice, or in the absence of any such reference, the design
criteria approved by the Central Government for existing structures or
excessive stresses in track shall be ordered until the sanction of the Central
Government has boon received through the Commissioner for doing so.

(e) The Commissioner may, for permitting new designs of locomotives, require
oscillation trials to be conducted and call for the records for his scrutiny.

(f) A rolling stock having different principal dimension or a different bogie
design or new designs of braking system or suspension details like axle
load, track loading density, unsprung mass being different shall be regarded
as now rolling stock:

Provided that any minor change or equipment design or change of internal
equipment layout on the rolling stock or minor change of axle load or minor
change of track loading density or minor change in unsprung mass shall not
be regarded as now rolling stock, unless such changes are likely to
significantly affect weight distribution, center of gravity or riding behavior of
the rolling stock: Provided further that any modification in the design of the
coach which alters the system of operation and control over the rolling
stock, like change in the braking system or change in the principle of traction
shall be regarded as a material modification in the type and design of the
rolling stock.

(g) In case of any difference of opinion in the Research, Design and Standards
Organisation, whether or not any change or modification is to be regarded
as a now rolling stock, the Research, Design and Standards Organisation
shall, through the Commissioner, refer the matter to the Central Government
for final decision thereon.

*Amended vide GSR 945(E), dated 01.10.2018.

9.4.2 Use of New Types of Locomotives or Rolling Stock by Railway
Administration (*Added/amended vide GSR 945(E), dated 01.10.2018)

(a) The General Manager of a Government railway may sanction the use of any
locomotive or rolling stock already introduced on Indian railway by the
Central Government under the provisions of Para 9.4.1, on any section or
division of railway under his control:

Provided that the railway administration other than the Government railway
shall require the approval of the Central Government through the
Commissioner for use of any locomotive or rolling stock already introduced
on Indian railway by the Central Government under the provisions of Para
9.4.1, on any section of railway under its control.

Chapter 9: Procedure for Commissioning of Signalling Installations Page 190 of 535