When the plan is being prepared, the organization should settle who inside it holds which roles, responsibilities and authorities and, where relevant, what responsibilities and authorities external parties hold. The people engaged in the case, both internal staff and, where it makes sense, relevant interested parties, should take part in drafting the plan. If a resource is in short supply, the plan may have to say how competing demand for it will be met.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.