Your neighbour's stereo system malfunctions when you are transmitting. What provision in Electromagnetic Compatibility Advisory Bulletin EMCAB-2 deems the stereo system's lack of immunity is the cause?

Innovation, Science and Economic Development Canada (ISED) sets immunity criteria for non-radio consumer electronics. If your transmitting field strength is measured on your neighbour's property and falls below this threshold, it means your signal is within acceptable environmental limits and should not be causing interference to properly shielded equipment. Because your field strength is below the specified threshold, the fault lies with the stereo system's inadequate shielding or circuit design, meaning it lacks the required "immunity" to normal RF environments. If your signal were above the threshold, your transmission would be considered the cause.