A data holder must provide an online service that can be used to make product data requests for the data it holds, discloses the requested data in machine-readable form and conforms with the data standards (civil penalty). In the energy sector only the AER and the Victorian agency must provide it, and a retailer that chooses to offer one must meet this rule (clause 4.2 of Schedule 4).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.