For the purposes of this article the domicile of an alien insurer, other than insurers formed under the laws of Canada, shall be that state in which is located its principal place of business in the United States.

In the case of an insurer formed under the laws of Canada or a province thereof, its domicile shall be deemed to be that province in which its head office is situated.

(Added by Stats. 1959, Ch. 2120.)