No, the police officers stole my car before I learned of this.
And no, most police officers do not know the real rules, but I have heard of people filing suit against them for stealing their car, and getting their car back post haste.
The way to do it seems to get plates made by a group that sells to allodial car owners. I also need to look into it.
If you learn more, especially practical details, I'd love to know about this.
Please notify me if you ever write an article about this? I'd love to read it. ;)