Thanks Greenguy

I voted for the simple meta tag. It's easy and gets straight to the point. While I like the idea of refined labelling, I've been won over by the arguments that simple and easy is best. Easier to present to the public and easy to defend as well.
I'm thinking if refinement is what you're after, we could have the option of using the ICRA one as an extra tag, or as an alternative one.