From Civil war answers
Military service excludes those under 18. Does the SHRA apply to minors? Should we expect to see teenaged heroes ordered to go up against the Hulk, for example?
Tom Brevoort: Theres a difference between being registered and being a licensed super hero. So everybody with powers must register, regardless of agesuper-powers would be considered even more hazardous if they were in the hands of a minor, after all. But in most cases, its going to be difficult if not impossible to become a licensed super hero if youre a minor, which could lead to some interesting problems for some characters. But nobodys planning to throw children, super-powered or not, up against the Hulk or similar threats.