(1)

The stability of a double-decked public service vehicle shall be such that when loaded with weights of 59 kilograms per person in the correct relative positions to represent the driver and conductor, if carried and a full compartment of passengers on the upper deck only, if the surface on which the vehicle stands were titled to either side to an angle of 28 degree from the horizontal point at which overturning occurs would not be reached.

(2)

The stability of a single-decked public service vehicle other than a motor cab shall be such that under any conditions of load, at an allowance of 68 kilograms per passenger and his personal luggage for which the vehicle is registered, if the surface on which the vehicle stands were tilted to either side to an angle of 35 degrees from the horizontal point at which overturning occurs would not be reached.

(3)

For the purpose of conducting tests of stability, the height of any stop used to prevent a wheel of the vehicle from slipping sideways shall not be greater than two-thirds of the distance between the surface upon which the vehicle stands before it is tilted and that part of the rim of that wheel which is then nearest to such surface when the vehicle is loaded in accordance with the requirements of this rule.