Wis. Stat. § 219.03: Restrictions upon loans, security, interest rates, etc. not applicable.

No law of this state requiring security upon which loans or investments may be made, or limiting the amount of the loan to any stated proportion of the value of the security, or prescribing the nature, amount or form of such security, or prescribing or limiting interest rates upon loans or investments, or prescribing or limiting the period for which loans or investments may be made, or prescribing or limiting periodical installment payments upon loans or securities, or prescribing or limiting the right to buy, sell, have serviced or assign such loans or investments and the security given therefor, shall be deemed to apply to loans or investments made pursuant to this chapter.