Can we assume that all on-air people are capable of broadcasting "emergency information?" I don't think so. Who decides what it "emergency information?" The DJ? The GM? Or the local emergency officials?
This is a complicated matter, and some thought has actually gone into the answers to the questions. And the answers, based on practical experience from the past ten years, is that the decision making isn't made by anyone at the radio station, but by the designated local emergency officials. As I said earlier, there are some who think radio people are authorized quasi-government officials, who should make decisions regarding public information. But the laws say otherwise. Radio is simply a transmission service that is meant to be made available to actual designated emergency personnel in times of crisis. That's how EAS is designed, and that's also how local emergencies, such as floods, earthquakes, and other similar events, are supposed to be handled.