Wis. Stat. § 627.05: Classifications of insurance.

The commissioner may by rule define and delimit lines and classes of insurance for any purposes within the commissioner’s regulatory power, including:

(1) To delimit the underwriting powers of insurers doing business in this state;

(2) To provide a basis for determining the financial needs of insurers under s. 611.19 or comparable provisions of other chapters;

(3) To provide instructions for reports and replies under s. 601.42;

(4) To restrict combinations of lines or classes of insurance; and

(5) To determine which rules under ch. 632 are applicable.