The plan should say who handles communication with the customer in given situations, by what means, through which routes and contact points for particular customers or functions where this applies, what records of that communication are kept, and what happens when the customer sends a compliment or a complaint.
This control maps to 3 controls across 3 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 3 it maps to, and the evidence behind each claim, over MCP and REST.