Just to throw in my two cents. I read the brief again over the weekend. The section on rings suggests that sharing the story of a ring and what it represents is a big indication of trust.
I suppose my view is that a ring ceremony can be as big or small as appropriate to the allegiance. Two lovers exchange rings between themselves, joining a group an individual might put on a ring in front of the group leader or whole group. They are the ones involved and trusted with what the ring means giving the symbol meaning. No-one else ‘needs’ to know the significance, wearing the ring is the public declaration of a loyalty.
One instance you might do something very public is someone joining The League and declaring (if they felt they needed to) loyalty to the nation. Equally they could also just involve the Egregore as the embodiment of the nation.