I searched the subject of this topic and came up with a few results in this forum and most were before the new helmet laws came into place. The only thing I saw about the new helmet laws were that the helmet should be at least DOT-approved and no mention of any tint restriction. So I'm assuming that it's still the same and they are not illegal. Just making sure, because I bought a new helmet and if they are illegal I am able to return it. I know front window tint of cars are illegal due officer safety but can't see how a helmet visor can be an issue.
P.S. just did my MST today and didn't even have 1 mistake