<Li> on - duty law enforcement acting in official capacity </Li> <Li> off - duty officers or retired law enforcement who maintain their certification per Federal Law HR218 . </Li> <Li> unloaded firearms when traversing school grounds to gain access to hunting land, if the entry is approved by the school . </Li> <P> It is a forfeiture (fine) to possess a usable firearm on public property within 1000 feet of a school unless the carrier is a licensee . (If the gun is unloaded & encased, it is not a crime .) Wisconsin only issues resident licenses, and the ATF has interpreted federal law to mean that only licenses issued by the state in which the school is located are sufficient to void the "gun - free" school zone . </P>

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