Material modification :-
Material modification in railway can refer to several changes made to the materials used in railway infrastructure or rolling stock to improve safety, efficiency, or performance.
No material modification in a work or scheme as sanctioned should be permitted or under taken without the prior approval of the authority who sanctioned the estimate. In the case of estimates sanctioned by the Railway Board or higher authority instances of will be considered to be a material modifications of a sanctioned project or work are given in below –
The following may be taken as material modifications on the lines under construction and open line works estimated to cost rupees one crore and over .
