Delaware Governor Jack Markell signed into law a concussion act for the state, the basic principle is “when in doubt, sit them out”. The law mimics other states with concussion training for coaches as well as informed consent for parents and athletes. The best part of Delaware’s law is that it extends to junior high school aged kids, not just high school.
Before a player returns to play they must be medically cleared, similar to other states and the NFHS.
List of states, HERE.