Yeah, in many states, especially up north you need a salt applicator license for commercial work. It's about protecting waterways from over salting. Usually, there's a short course and a test through your local environmental agency but If you're just doing small, private jobs, you might not need it,I'm just starting this snow plow thing and i'm gathering a lot of info right now so i recently read on the internet about "salt applicators license". Can anyone explain what it is? Do i have to have it and how to get it?