Section 644.03 - Scope and purposes(1) SCOPE. This chapter applies to all mutual insurance holding companies organized under the laws of this state.(2) PURPOSES. (a) The purposes of this chapter are to provide complete, self-contained procedures for the formation of mutual insurance holding companies. Subject to par. (b), a corporation organized as a mutual insurance holding company under this chapter may be organized for any lawful purpose and shall hold directly or indirectly as a subsidiary at least one stock insurance company converted from a mutual insurance company or from a service insurance corporation that converted to a mutual insurance company. A mutual holding company is not an insurer.(b) A corporation organized as a mutual insurance holding company under this chapter may engage, directly or indirectly, in a business that is subject to regulation under another statute of this state only if not prohibited by, and subject to all limitations of, the other statute.