Section 31(6)(b) in The Central Motor Vehicles Rules, 1989
(b)the person imparting instructions in the driving of a transport vehicle shall possess the following qualifications, namely :(i)a minimum driving experience of five years in the class of vehicles in which instructions are proposed to be imparted;(ii)adequate knowledge of the regional language of the region in which the school or establishment is situated;(iii)thorough knowledge of traffic signs specified in the Schedule to the Act and the Regulations made under section 118;(iv)ability to demonstrate and explain the functions of different components and parts of a vehicle;