Once the photometric values have been measured according to the prescriptions of this Regulation, in the point for Emax for driving beam and in points HV, 50R, 50L for Class B passing beam and in points 0.86D-3.5R, 0.86D-3.5L, 0.50U-1.5L, 0.50U-1.5R and HV for Class C, D and E, for passing beam a complete headlamp sample shall be tested for stability of photometric performance in operation.
Once the photometric values have been measured according to the prescriptions of this Regulation, in the point for Emax for driving beam and in points HV, 50R, 50L for Class B passing beam and in points 0.86D-3.5R, 0.86D-3.5L, 0.50U-1.5L, 0.50U-1.5R and HV for Class C, D and E, for passing beam a complete headlamp sample shall be tested for stability of photometric performance in operation.