Where the mail-order seller takes payment before delivery and receives payment, it must without delay notify the buyer in writing (or electronically with consent) whether it accepts the order, with its name, address and telephone number, amounts received and dates, the goods and quantities, and the delivery timing as a period or deadline; a notice of non-acceptance states that the money will be returned immediately and how (Regulation Articles 37 and 38). No notice is needed if the goods are sent promptly after payment.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.