Seriously curious, What about licenses ?
I just heard all this for "official" when we took my daughter in to get her license.
If you have a regular car drivers license your all set. No special endorsements or anything needed. Or, if you don't have a license at all, you can take a 10 question test, ride around in the parking lot for 5 minutes and they give you a "Moped License", that
anyone can get. 10 years old? 15 DUI's? Here on a green card? Doesn't matter. Long as you pay $25 & pass the test, you get the license. Just make sure the word "Moped" is visible on the back of your bike. That's your "plate". I wrote it on ours with a paint marker!

Technically (legally), your not supposed to have more than 50cc's... But unless the cop is also a scooter mechanic,
no way can he or the average person ever tell the difference between a 50, and a 150.

Externally, the only way to tell is the
coded part number stamped on the bottom of the case.

that's a 50.

My neighbor has two new cars between him and his wife, a '67 Cobra Mustang, a Harley Fat Boy, and he rides his scooter to work +50 miles round trip almost every day "just cause its fun".