Space stations shall be fitted with devices that ensure immediate cessation of their radio emissions by telecommand whenever the Regulations require it (22.1); Article 15 cross-refers to this as a condition of avoiding interference, No. 25.11 requires enough amateur-satellite earth command stations before launch to use it, and Resolution 32 requires short-duration missions to be able to cease transmitting at once.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.