In designated bushfire prone areas, exposed water piping must be metal and other pipes buried with minimum cover (2003 text). The 2021 preface says the bushfire clause was removed in anticipation of the PCA taking up bushfire requirements, yet the 2021 contents still lists 5.21 with this title; its current wording is not held, so the leaf records the requirement area only.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.