Wis. Stat. § 625.31: Operation and control of rate service organizations.

(1) License required. No rate service organization shall provide any service relating to the rates of any insurance subject to this chapter, and no insurer shall utilize the services of such organization for such purposes unless the organization has obtained a license under s. 625.32.

(2) Availability of services. No rate service organization shall refuse to supply any services for which it is licensed in this state to any insurer authorized to do business in this state and offering to pay the fair and usual compensation for the services.