Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class?
Why FCC rules 97.403 and 97.405 say that in a genuine emergency, when normal communication channels are unavailable and human life or property is in immediate danger, an amateur may use any means of radiocommunication at their disposal to call for or provide help. That includes transmitting outside your license class privileges, or even outside the amateur bands. It is a narrow exception for true life-and-death situations, not a general license upgrade and not something you invoke for convenience or for drills.
Watch out The RACES and FEMA choices are tempting because those programs do involve emergency work, but participating in a drill or a government emergency plan does not by itself expand your privileges. The trigger is the immediate emergency itself, regardless of what organization you belong to.
Immediate danger to life or property is the only key that unlocks frequencies you are not licensed for.