The State of Wisconsin passed a law regarding concussion awareness and education. Every athlete, every parent, and every coach are required to state in writing that they have read the required information regarding concussions.
This is required before every season, in-school and out of school. This includes summer leagues, Pop Warner football, AAU. Anything that is organized and has a competitive element requires this.
It is the responsibility of each individual who is organizing these activities to have the proper paperwork done.
Below is a link from WIAA with more concussion education and also links to areas you can secure the forms needed.
http://www.wiaawi.org/index.php?id=430 - WIAA website regarding concussion education.