An insurer authorized to transact insurance in a foreign country may make investments, in a manner consistent with the laws of such country, in securities or other investments within such foreign country which are similar in characteristics and quality to like investments required pursuant to this article for investments in the United States of America. The aggregate amount of the investments must not exceed the amount which is customary and necessary for the servicing of the insurance which the insurer has in force in the foreign country. Canadian securities eligible for investment under this article are not subject to this Code section.