Section 144(2)(a) in The Punjab Motor Vehicles Rules, 1989
(a)the part of the seat against which the driver's back rests shall not be less than 280 millimetres from the nearest point on the steering wheel and that the seat shall be so constructed as to be adjustable in such a way that the distance is increased 350 millimetres, the driver's seat shall be constructed as to permit an up and down adjustment in addition to the fore and after adjustments mentioned herein.