> specifically stated instead of it the norm.
> the need to state any derivative work is not a fanfic
by default the authors opinion has no bearing on this. if an author somehow blessed the work as "canon" like the council of nicea, itd be a rare exception. ff as a rule ignores the approval of authors entirely.
what defines fanfic IS the norm, the custom, rather than law. what constitutes a hot fudge sundae depends not on licenses but the things people typically make it with.