To drive a motor scooter, do you need a license for it?

depends on state or country- if in UK you probably won't be able to run it on road until 16 and some tests. US- under 50cc scooter might not need a drivers license, Iowa you can get moped/scooter permits 15, some other states also mentioned as allowing 15 year olds to ride with permit at that age- Texas, Michigan, Arkansas mentioned past week, Ohio and Colorado mentioned not to require any license- drunk drivers with pulled license get around on them. So what state are you in? does it consider a under 50cc scooter a 'moped' , not requiring a license? Or letting 14/15 year olds get a scooter/moped permit/license? Or is it like New Jersey that says any scooter size requires a motorcycle endorsement on license?