Hi there ,
Another advantage of Nat. registry is that if you respond to a large natural disaster or god forbid , another 911 , if you wind up working with an out of area EMT who's got the registry , you and that person have equivelant training . There's no guesswork about whether or not the skills are the same.
Correct me if I am wrong, but isnt the training essentially the same across the country? Doesn't the DOT monitor the training so, apart from a few skills, there is a national standard for education? Wouldn't the difference between states just be scope of practice and governing structure?