I am looking for a canonical answer to a question: What are the minimum requirements to become a member, and remain a member, of the Order of Hermes?
One thing for sure: you have to swear the Oath. But who do you have to swear the oath to, what witnesses need to be there, and does membership need to be verified or approved by any external authority?
Given that unGifted Redcaps are members, possessing the Gift can't be a universal requirement, but maybe it is a requirement for all outside House Mercere? Nor can training in Hermetic magic be a requirement given that hedge wizards have joined the Order without, presumably, having to go through a 15 year apprenticeship first.
Does a member of the Order of Hermes also have to be a member of a House? Do they also have to be a member of a regional tribunal? (I think I read in Faith and Flame that a member of the Provencal Tribunal has to attend one tribunal meeting in three to retain membership, so there may be some magi who drift out of membership of any tribunal.)
The reason for asking is that in my saga, the ExMisc tradition of Hermetic Sahirs were ousted from Iberia about 50 years ago, following a series of Wizard's Wars (and some illegal attacks) waged against them, mainly by members of House Flambeau from Iberia and Provencal. Some Sahirs died, others fled to Africa, where they also did not fare well. But some who have survived hope to return, and in the meantime they have trained some apprentices, who have sworn oaths to their parens and are known to other Hermetic Sahirs but are unknown to the Order as a whole. Would the elder magi, who have not attended a tribunal meeting in 50 years nor had any other contact with the Order in Europe, still be considered members of the Order? And what of their newly gauntletted apprentices?