No requirements! We have people dormant for ages, and they can always come back later. Like the Patrician, who's gone quite dormant on margolotta on account of, among other things, his RPer running useless_caucus.

You are in no danger there. You are free to come and go as you please.

Just post a comment to the group journal (discworld_rpg) to say you're interested. William is les_mots_justes, and there you can read up on him. It's Frarsie (fahye who's willing to give him up. She's mostly doing Chidder and his OC sister Jeannie these days, and taking up Ginger in addition. We won't even have to ask Siobhan to put your character on the group, as William's already on it.