Both [hash.requirements] and [tab:cpp17.hash] are titled "Cpp17Hash requirements". However, the table is but a subset of those, namely expression requirements. It should be appropriately renamed, and the reference to it in [unord.hash] updated to refer to the subclause, as it imposes the requirements on hash<Key>, a type.

A quick look at the preceding subclause shows that Cpp17NullablePointer has the same naming issue. This issue might thus apply more generally.