Proposed resolution:

Add the term "exposition only" in the following two places:

Ammend [auto.ptr]p2:

The exposition only class Ttemplate auto_ptr_ref holds a reference to an auto_ptr. It is used by the auto_ptr conversions to allow auto_ptr objects to be passed to and returned from functions. An implementation is permitted to provide equivalent functionality without providing a class with this name.

namespace std {
 template <class Y> struct auto_ptr_ref { }; // exposition only