Each member takes on, at the least, the carbon targets the owner has set, and shares carbon targets with the other members. It gathers and reports the asset-level and whole life carbon data its own activities generate so future baselines can be built, acknowledges the limits on how precisely its work can be compared with a baseline during delivery, and discloses the uncertainties openly at the right stages.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.