I'm pretty sure that quote comes from a proposed change for 2023, where they are dropping the access control recording privilege.

The same wording for 2020 is this...

(4.2)  — If two pointers point to different non-static data members of the same object, or to subobjects of such members, recursively, the pointer to the later declared member is required to compare greater provided the two members have the same access control (11.9), neither member is a subobject of zero size, and their class is not a union.