Wis. Stat. § 601.55

If another state or a foreign country requires domestic insurers doing business in that state or foreign country to deposit security, to pay a fee or tax not included in the computation under s. 76.66, to pay a fine or penalty or to comply with an obligation, prohibition or restriction that is in addition to or greater than requirements imposed by this state on nondomestic insurers doing a similar business in this state, this state may, as a condition for issuing a license to an insurer domiciled in that state or foreign country, impose a similar security requirement, fee, tax, fine, penalty, obligation, prohibition or restriction.