The organization should spread business continuity principles along its supply chain so that suppliers become aware of them and apply them more effectively (4.2.2), encouraging suppliers to practise SCCM with their own suppliers so that continuity provisions reach Tier 2 and beyond, outside the organization's direct control (4.2.1 and the introduction).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.