OMG I must say thanks in advance for finding this thread as we are taking one of my sons friends with us this time (aged 14)and we will now make arrangements to get some authorisation letter from his parents. My other son will also be taking his girlfriend with him who is 16. Will she be Ok in American law to be responsible for he own well being including immigration and any medical treatment or will the same apply to her as it will my sons 14 year old friend? Your advice would be appreciated