What name is given to a form of interference that seriously degrades, obstructs or repeatedly interrupts a radiocommunication service?

Under Canadian telecommunications law and international radio regulations, the specific legal term for interference that seriously degrades, obstructs, or repeatedly interrupts a radiocommunication service is "harmful interference." This is a foundational definition used to enforce spectrum rules and resolve conflicts between stations. It triggers specific enforcement actions by regulators, which is why operators are legally bound to avoid causing it. While terms like "intentional interference" or "disruptive interference" might sound correct in plain English, they are not the official regulatory terms.