So you’re telling me if there is one thing in a Wisconsin lease/rental agreement that violates the rules in ATCP 134.08 that I cannot enforce any of the agreement?
Yes, under Baierl v McTaggart the entire lease is invalid as far as the landlord’s enforcement. But it is worse than that. The Court ruled subsequent to Baierl in Dawson v. Goldammer that the tenant can enforce the parts they like.