Plan managers ensure the prices they pay do not exceed the maximum amounts, whether the provider is registered or not, quote the provider's ABN on every payment request (unless the provider is exempt and a Statement by a Supplier is kept), include a valid tax invoice, acknowledge compliance when claiming, and may have to repay amounts not spent according to the plan.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.