Western Australia replaces H1D7 so that the low-high-low cyclic pressure test sequence of Table H1D7 (4500, 600, 80, 1, 80, 600 and 4500 cycles at 0.45, 0.6, 0.8, 1.0, 0.8, 0.6 and 0.45 of the ultimate limit state pressure) applies to metal roof assemblies, their connections and immediate supports in wind regions B, C and D, not only C and D; the other cladding routes are as in the national clause. WA also treats wind region B (including B2) as a cyclonic classification and keeps region D design wind speeds north of the Tropic of Capricorn similar to the 2011 edition of AS/NZS 1170.2, through its Schedule 1, Schedule 2 and Housing Provisions variations.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.