If we want to use some vehicles for a special use, does this matter? Let's say one of the cars could be used as a police car, I believe this is something that should be mentioned, right?
It matters that instead of using one set of IP (e.g. Ford Interceptor) are using two sets of IP (e.g. Ford Interceptor and police trademarks).
So yes, it matters because you will face even more lawsuits if you violate it, or more licensing fees if you properly license it.
: Edit: Shame on me for assuming lawlessness. :-/