Wis. Stat. § 421.107: Effect of chapters 421 to 427 on powers of organizations.

(1) Except as specifically provided, chs. 421 to 427 prescribe maximum charges for all consumer credit transactions and displace existing limitations on the powers of creditors based on maximum charges.

(2) Except as specifically provided, with respect to sellers of goods or services, lessors of goods, small loan companies, licensed lenders, consumer and sales finance companies and commercial banks and trust companies, chs. 421 to 427 displace existing limitations on their powers based solely on amount or duration of credit.

(3) Except as provided in sub. (1), chs. 421 to 427 do not displace limitations on powers of credit unions, savings banks, savings and loan associations or other thrift institutions whether organized for the profit of shareholders or as mutual organizations.

(4) Except as provided in subs. (1) and (2), chs. 421 to 427 do not displace:

(a) Limitations on powers of supervised financial organizations (s. 421.301 (43)), with respect to the amount of a loan to a single borrower, the ratio of a loan to the value of collateral, the duration of a loan secured by an interest in land or other similar restrictions designed to protect deposits; or

(b) Limitations on powers an organization is authorized to exercise under the laws of this state or the United States.