(1g)   In this section:
      (a)    “Emergency situation” means a situation in which a pupil reasonably believes that he or she is experiencing a severe allergic reaction, including anaphylaxis, that requires the administration of epinephrine to avoid severe injury or death.
      (b)    “Epinephrine auto-injector” means a device used for the automatic injection of epinephrine into the human body to prevent or treat a life-threatening allergic reaction.
      (c)    “School” includes a public, private, and tribal school.
   (1r)   While in school, at a school-sponsored activity or under the supervision of a school authority, a pupil may possess and use an epinephrine auto-injector if all of the following are true:
      (a)    The pupil uses the epinephrine auto-injector to prevent the onset or alleviate the symptoms of an emergency situation.
      (b)    The pupil has the written approval of the pupil’s physician and, if the pupil is a minor, the written approval of the pupil’s parent or guardian.
      (c)    The pupil has provided the school principal with a copy of the approval or approvals under par. (b).
   (2)   No school board, school district, private school, or tribal school, or any employee of the foregoing, is civilly liable for an injury incurred by any of the following:
      (a)    A pupil as a result of using an epinephrine auto-injector under sub. (1r).
      (b)    Any person as a result of a pupil possessing or using an epinephrine auto-injector under sub. (1r).