An individual is entitled to be told whether their personal data is processed by or for the data controller and, on a written data access request with the prescribed fee, to information about the data and a copy in intelligible form (one request, separate requests for separate entries). The controller must acknowledge receipt (reg. 9(2)) and comply within 21 days; if unable, it must before then give written reasons and comply as far as it can, and comply fully within a further 14 days. A controller that controls the processing so as to prevent the holder complying is treated as holding the data.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.