Where the seller is the original owner of a lot in a community titles scheme and the buyer gives the seller a power of attorney (typically to vote at body corporate meetings and sign scheme documents), the power may be exercised only if before it is given the seller gives the buyer a statement describing the power and the circumstances in which it may be exercised, in the approved form, and the buyer signs it.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.