Notes from the April, 2007 meeting:

The CWG agreed with this suggested resolution; however, the reference is in the “Preprocessing Directives” clause, which WG21 intends to keep in as close synchronization as possible with the corresponding wording in the C Standard. Any change here must therefore be done in consultation with WG14. Clark Nelson will fulfill this liaison function.

It was also noted that the imminent introduction of constexpr also has the potential for a similar kind of confusion, so the proposed resolution should address both casts and constexpr.