There must be a system in the facility for decontaminating liquid effluent that contains, or may contain, GMOs, GM micro-organisms included. This includes effluent from washing up pots, containers and other equipment that holds or may hold GMOs. The note suggests holding the effluent and treating it in a waste treatment vessel inside the facility or just outside it, and says there is no need to hold effluent before discharge if the sewage system can decontaminate the GMO.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.