Senate Bill 420 aims to prohibit cities, villages, towns, and counties in Wisconsin from enacting ordinances that confer legal rights to natural resources. Specifically, the bill defines a "rights of nature ordinance" as one that grants legal rights for a natural resource to exist, be protected against pollution, or maintain a healthy ecosystem.

The bill introduces a new section, 66.0132, into the statutes, which explicitly states that no political subdivision may enact such ordinances. This legislative move reflects a broader trend of limiting local governance over environmental rights and protections.