Zones around baths and showers are classified (for fixed shower connections, Zone 1 extends 1.2 m radius; in Australia a 0.6 m dimension may be reduced by a 1.8 m barrier; other water containers up to 40 L have Zones 0 and 2); minimum ratings are IPX7 for Zone 0 and IPX4 for Zones 1 and 2; prohibited measures and equipment rules apply, and generation systems and batteries may not be installed in any classified zone.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.