I never got much response on this post:
So I guess the issue cannot be that important.
Use common sense and ALWAYS avoid centre of activity, if you can, for planned and long-duration QSOs no matter mode.
I believe it is as simple as that given that a stringent bandplan will hardly ever work and definately not in a forseeable future given the scattered allocations. Activity should always rule over no activity.
Bo, OZ2M - Looking for DX? Try VUSHF DX-peditions www.rudius.net/dxp