Free means free. No whitelist, and no Community Framework needed. Just load it alongside any CZ Autoz vehicle mod.
Slots
The CZ Autoz cars gain two slots you can fit a plate into:
Any plate fits any car that has these slots, and the front and rear slots take the same plates.
Plates included
Plates are small items — three inventory slots by one, and 150 g — so they are easy to carry as a spare or to trade.
Making your own plates
The mod includesLicensePlate_Base. It never appears in game by itself; it is there so you can build your own plates on top of it, as many as you like, by swapping a single image. Paint your design over a copy of the plate texture, save it as a .paa file, and add a short config:
types.xml
These are example values. Adjust them to suit your economy, or leave them out entirely and hand plates out through traders and events instead.