Comment by pixl97

>Then who is an authority on the topic?

That's the neat thing. Nobody is. It is a multi-consensus arrangement where you have different parties that accept different definitions.

>in which case you have to somehow demonstrate that's the way people understand it?

Why?

This is a common mistake a lot of people make. "I think X = 1, therefore everyone that is correct thinks X = 1". There could be huge variation in subgroup understanding on what this should be, and as long as there is no overarching legal requirement then you could consider them all correct on matters of opinion.