A prescribed mine's operator must ensure, as far as reasonably practicable, that material used to fill mined-out areas does not create a health or safety risk to any person. Its Act compliance note (r 7) ties it to sections 21, 23 and 26 of the Act: it sets how those duties are performed for backfilling.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.