Where calling line identification is available, the provider lets the calling user block it free of charge and simply, call by call (and the subscriber line by line), subject to the rules on the public opposition register for marketing; lets the called subscriber block identification of incoming calls and reject calls whose identification was withheld; lets the called subscriber block connected line identification; applies these to calls to and from non-EU countries; and informs subscribers and users of these options.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.