A PCBU identifies any risk of a physical or chemical reaction involving a hazardous chemical used, handled, generated or stored (unless the reaction is part of a manufacturing or deliberate process), and takes all reasonable steps to ensure hazardous chemicals do not contaminate food, food packaging or personal use products such as cosmetics (agricultural use under the relevant law excepted).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.