There isn't one now- it has no reference to the future for me, and refers to an imaginary present situation. That doesn't mean that this could never refer to the unlikely future, but context would make things clear. Logic tells us that there has been no past case or the slot in the Guinness Book of Records would have been taken and the requirement would be for more than three metres. All the person is trying to tell you is that there isn't anyone who meets the requirements today.
You are looking at single sentences for a definitive answer to things they cannot provide. We construct meaning in context and not in single sentences in isolation. Grammar doesn't provide us with everything- it gives us pointers and the context will make things clearer.