This goes beyond just frequency and power conformance. There's power negotiation, interference avoidance, instantaneous occupied bandwidth, instantaneous vs ave

This goes beyond just frequency and power conformance. There's power negotiation, interference avoidance, instantaneous occupied bandwidth, instantaneous vs average power limits, spread spectrum/freq hopping performance, radar avoidance algorithms - it took a lot of effort to carve up the 5GHz bands, each part of the world has done it differently, and so there's a lot more strings attached.