Coordination rules are the technical and regulatory conditions that let different services share the same spectrum without harmful interference. They typically define who may transmit, where operation is allowed, what power levels are acceptable, and when a system must step aside or obtain approval. In practice, these rules turn a crowded band into something operators can plan around.
In cyber security, coordination matters because shared radio infrastructure can become a reliability target. If the rules are weak, unclear, or poorly enforced, an attacker or misconfigured system can create congestion, interference, or service disruption that looks like a denial-of-service event. Defenders use coordination rules to support spectrum databases, exclusion zones, logging, and dispute handling, so multiple networks can coexist while preserving availability and accountability.