I have to get my Missouri license plate sticker renewed and jumping through the required hoops makes me wish we'd registered this truck in Illinois. You must have an emissions test, proof you paid your vehicle property tax (yes Missouri makes you pay property tax on your cars), insurance and one other thing I've forgotten.
The worst part is the emissions test which I truly believe is a racket put in place to benefit all kinds of entities and businesses except the car owner. And, the emissions places often act like they're doing you a favor all the while raking in the money from the many people waiting in line to have their vehicle checked. If it doesn't pass then you're paying someone else to fix it and then go through the emissions process again.
It's a scam IMHO.