Except as provided in s. 631.011, the “domicile” of an insurer means:(1) As to Canadian insurers, Canada and the province under the laws of which the insurer was formed.
(2) As to other alien insurers authorized to transact insurance in one or more states, the state designated by the insurer in writing filed with the office at the time of admission to this state or within 6 months after the effective date of this code, whichever date is the later, and may be any of the following states:(a) That in which the insurer was first authorized to transact insurance if the insurer is still so authorized.
(b) That in which is located the insurer’s principal place of business in the United States.
(c) That in which is held the larger deposit of trusteed assets of the insurer for the protection of its policyholders and creditors in the United States.
If the insurer makes no such designation, its domicile shall be deemed to be that state in which is located its principal place of business in the United States.
(3) As to alien insurers not authorized to transact insurance in one or more states, the country under the laws of which the insurer was formed.
(4) As to all other insurers, the state under the laws of which the insurer was formed.