Where more than one business shares responsibility for one health and safety matter, as often happens in excavation work, the PCBU must consult every other person holding a duty on that matter and cooperate and coordinate with them, as far as reasonably practicable. Duty holders should share information about the division of tasks and cooperate so that no party's activities put other workers at risk. For instance, civil engineers and contractors should discuss with other duty holders the risks of the excavation, including traffic and plant moving near the excavation area.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.