A controller may not require a consumer to create a new account in order to exercise a right, though it may require use of an existing account to submit a verified request; and it may not, based solely on the exercise of a right and unrelated to feasibility or the value of a service, increase the cost of, or decrease the availability of, the product or service.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.