Installations use the MEN system (other systems only where Part 1 is met and the distribution system is unaffected), with an accessible MEN connection at the main switchboard; protective and functional earthing functions; earthing conductor materials and sizes, main earthing terminal, and earth electrodes selected for corrosion resistance and strength.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.