Where the clauses from E1D5 through E1D13 switch a sprinkler obligation on, the system fitted has to meet Specification 17, and Specification 18 where that also applies; the switch-on points turn on effective height, storey count, classification (residential and health care, assembly uses, and higher-hazard occupancies among them), floor area and volume, with narrow carve-outs for a small open-deck carpark or a small electricity substation (E1D4 to E1D13).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.