(1)in section 2, after clause (a b), the following clause shall be inserted, namely:-"(ac) 'Floor area' of a motor vehicle means the area of the vehicle obtained by multiplying the. overall length with the overall width of the vehicle and for a double decked bus it shall be twice the floor area.Explanation. - For the purpose of this clause, 'overall length' of a motor vehicle is the length of the vehicle measured between parallel planes passing the extreme projection points of the vehicle exclusive of a starting handle, any hood when down, any tire-escape fixed to a vehicle, any post office letter box, any ladder used for loading or unloading from the roof of the vehicle or any tail or indicator lamp or number plate fixed to a vehicle, any spare wheel or spare wheel bracket or bumper fixed to a vehicle or any towing hook or other fitment and 'Overall width' of a motor vehicle is the width of a motor vehicle measured at right angle to the axis of the motor vehicle between perpendicular planes enclosing the extreme points exclusive of a rear-view mirror or guard rail or a direction indicator."
