Many communities set up or nominate a central supporting entity to organize and assist the sharing; such a body can deliver controls like hiding the identity of sources and recipients with less effort and more efficiency than members exchanging directly. Annex D describes two widely used models, WARP (Warning, Advice and Reporting Point) and the Trusted Information Communication Entity (TICE).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.