At what point is a tip considered phenolic?

[Black-Balled]

Lets say you go to a tournament that has a rule that says you cannot break with phenolic. You have a resin based tip or a really hard leather tip. It looks like phenolic and sounds like phenolic. How should the tournament director decide what the tip is made out of? It isn't as cut and dry and you might think since few people are really qualified to say one way or another.

That is why the rule should be no non-leather tips, insteadf of no phenolic tips.