Wagering transactions cannot be modified except by voiding or cancelling in line with the cancellation policy the operator publishes; a grace period for cancelling may be offered; player-initiated cancellations follow the policy, operator-initiated cancellations give the player a reason such as a past-post wager, and no wager is voided or cancelled without the regulator's prior approval.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.