In fairness, we haven't totally sorted out copyright. We're seeking legal advice on that. My own view offhand, without having considered it, is that the copyright would remain with the consortium that produces and disseminates the debate. Any breach of copyright infractions would be handled in that route. They're not totally satisfactory because usually you can't deal with breach of copyright until the breach has occurred and the horse is out of the barn so to speak.
On May 2nd, 2019. See this statement in context.