Under this clause the supplier writes the technical requirements specifications for the products at the next level down so that they agree with each other and with the specification received from the customer, writes them to the rules of ECSS-E-ST-10-06, including the DRD in that standard, and keeps a specification tree, to the specification tree DRD, for its own product and the ones below it. Where the supply chain has three or more layers counting the customer, the highest-level supplier defines at the start of the project a set of specifications for the aspects that several lower-level products share.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.