On May 27, 2011, Alaska Governor Sean Parnell signed the state's youth sports concussion safety bill [1] into law, adding the state to the list of states that have passed strong legislation since May 2009.
Links:
[1] http://www.legis.state.ak.us/basis/get_bill_text.asp?hsid=HB0015A&session=27
[2] https://momsteam.com/health-safety/every-state-has-youth-sports-concussion-safety-law