The "domicile" of an insurer means:
(1) As to Canadian insurers, the province in which the insurer's principal office is located.
(2) As to other alien insurers authorized to transact insurance in one (1) or more states, as provided in KRS 304.3-270.
(3) As to alien insurers not authorized to transact insurance in one (1) 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.