If you can die for country at 18 or at 16 if they really need people you should be able to vote, drink a beer, or buy a lottery ticket. In Europe they have no drinking age limit and have a much less achol abuse rate. What I am trying to say is that if you are qualiflied for the job and you know how to operate the machinary you should be able to operate the rides. I guess MO changed on this one.