Section 5(4)(a) in The Railways (Opening for Public Carriage of Passengers) Rules, 2000
(a)Certificate in Form XVI containing the comments on the following matters, namely :-(i)maximum and minimum dimensions;(ii)strength of bridges;(iii)number of engines on one span;(iv)brake and communications;(v)accommodation in coaches to cater, for different categories of passengers;(vi)system of working;(vii)electric traction equipment (only if applicable); and(viii)types of rolling stock proposed along with list of restrictions.