Proposed resolution:

Add a new section, after 6.2.2.3:

T*       data()
const T* data() const;

Returns: elems.

Change 6.2.2.4/2 to:

In the case where N == 0, begin() == end(). The return value of data() is unspecified.

array<>::data() is present in the class synopsis, but not documented.