Sounds correct to me. I took my daughter's friend on a cruise last summer and we had a notorized letter from her parents, her passport and also a note that the parents wrote (doesn't have to be notorized) giving permission to authorize medical treatment if necessary/an emergency. Make sure you write down the child's insurance company and policy # in case needed. Otherwise, have fun!
Luisa Frey Gaynor
Family Cruise Editor