No policy covering any liability arising out of the ownership, maintenance or use of an aircraft, may exclude or deny coverage because the aircraft is operated in violation of air regulation, whether derived from federal or state law or local ordinance.
Wis. Stat. § 632.23
Prohibited exclusions in aircraft insurance policies
1975 c. 375.
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.