Each game fork has its own rules. Additional forks may be possible if the particular game would allow it at the time. Reunifications must be legal in all affected forks.
[rab] You may find that posting to an English-language website in German will not win you friends or influence people. Don't do it again, or I'll send the boys round. Oh, and it's Anstrenge, not Anstrengend.
[Martha] Well, I've realised there's nothing doing with mine for the next couple of months, sadly, although it was a rather good concept, tho I say so myself, so I guess your move would at least provide some action.