A relevant participant must enter transactions only by matching pre-trade transparent orders on an order book, except for block trades, large portfolio trades, trades with price improvement and permitted out-of-hours trades under the conditions in Part 6.2; trades done otherwise than on an order book must be reported to an operator immediately (or within the times the rules allow), subject to the delayed reporting rules.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.