HB 3572 revises municipal zoning regulations and procedures. It explicitly includes zoning classifications as part of zoning regulations and modifies public notice requirements for proposed zoning classification changes, requiring certified mail notices and online postings if applicable. The bill introduces a reconsideration mechanism for zoning regulations or boundary changes if a petition is signed by at least 40% of affected landowners within two years of adoption. It also allows legal actions against municipalities for procedural violations in zoning regulation adoption, with a waiver of governmental immunity.