No sorry I have not mis-read it. The key words are N’ont pas d’incidence which means Do not affect (the calculation of the total height):
N’ont pas d’incidence sur le calcul de la hauteur totale :
(Do not affect the calculation of the total height
Les accessoires, tels que : antennes, coffres ou barres de toit, revolving lights, taxi signs, satellite dishes, skylights, solar panels, gyrophares, enseignes taxi, paraboles, lanternaux, panneaux solai
(- Accessories, such as: aerials, boxes or roof bars, revolving lights, taxi signs, satellite dishes, skylights, solar panels)
This has been well covered in earlier threads. Let's not create a problem where there isn't one.