Before work starts, a risk assessment must be done at the work site to rate the risk of every hazard identified, and where hazards exist the risks must be prioritized and controls put in place under clause 2.5 (Appendix E has an example matrix; AS/NZS IEC 31010 gives techniques).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.