As far as I'm aware, inbound track to the holding fix is the sole mandatory requirement; 'due allowance' for the effect of wind shall be made to facilitate this.
Why do so many people make such a ludicrous art form of what is really only a fairly non-precision event? To hear some puddlejumper instrument instructors talk, you'd think that the NDB hold is more important than any other aspect of instrument flying. It really isn't!!