(1)

Generators shall be so mounted that any air inlets shall point away from the main petrol tank filter cap.

(2)

No generator and no pipe between the generator and the gas filters shall be so placed that any part of the generator of such pipe is within a distance of less than -

(a) 61 centimetres from any part of the petrol tank;

(b) 122 centimetres from the filling point or office or of the petrol tank :

(3)

The filler cap and any other opening in the main petrol tank shall, where the generator is mounted on the side of the vehicle, be located on the opposite side of the vehicle to the generator, and shall be not less than 122 centimetres away from the generator and from the pipe leading from the generator to the gas filters.

(4)

Any auxiliary petrol tank with gravity feed shall be located in front as far from the generator as practicable.