Wisconsin Statutes Marriage and Family (Ch. 765 to 770) § 767.315. Grounds for divorce and legal separation

(1) Irretrievable breakdown. (a) If both of the parties to a legal separation or divorce action by petition or otherwise have stated under oath or affirmation that the marriage is irretrievably broken, or if the parties have voluntarily lived apart continuously for 12 months or more immediately prior to commencement of the action and one party has so stated, the court, after hearing, shall make a finding that the marriage is irretrievably broken for purposes of s. 767.35(1)(b)1.

(b) If the parties to a legal separation or divorce action have not voluntarily lived apart for at least 12 months immediately prior to commencement of the action and if only one party has stated under oath or affirmation that the marriage is irretrievably broken, the court shall consider all relevant factors, including the circumstances that gave rise to filing the petition and the prospect of reconciliation, and proceed as follows: