This makes the exact opposite of sense, though. NT has an interest in recovering their personnel, and figuring out what's going on aboard their stations.
If the recall allowances run out, you should still be allowed to call a shuttle and NOT allowed to recall it, not prevented from calling it again. that's just making it easier for people to forcibly drag the round on.
Also automatically dispatch an ERT when recall allowances run out, because that's an obvious sign that something is very wrong, and NT needs to send an entity they can trust to investigate the situation
I agree but, the ERT should arrive less "something is very wrong" and more "who the hell keeps firing off false alarms!?" If you keep activating an emergancy signal on, then off, then on, then off, the authorities arrive to reprimand you, be it a police or the train conductor.