Wis. Stat. § 29.199: Authorizations for certain patients and institutionalized persons to fish.

The department shall issue an authorization without charge to a county hospital, state or federal mental hospital, state correctional institution or nonprofit institution located in this state for rehabilitation purposes upon request of the superintendent of the institution. The authorization permits a resident of the hospital or institution who is supervised by an employee of the hospital or institution to fish for fish subject to all other provisions of law.