We could refer to the actual text: http://www.assemblee-nationale.fr/dyn/15/amendements/2493/AN...
Which amends http://www.assemblee-nationale.fr/15/textes/2493.asp#D_Artic...
This adds a set of "bands" to the bottom of the table of tax based on "Puissance administrative", see https://en.wikipedia.org/wiki/Tax_horsepower or https://www.french-property.com/guides/france/driving-in-fra...
Looks like a Toyota Land Cruiser is about 11-12: https://www.neowebcar.com/puissance-fiscale/toyota/land-crui...