A bank may, with the approval of the division, invest an amount not exceeding in the aggregate 15 percent of its capital in one or more corporations principally engaged in international or foreign banking, or banking in dependencies or insular possessions of the United States, organized pursuant to 12 U.S. Code § 611 to 631. A bank may also invest, with the approval of the division, an amount not exceeding in the aggregate 10 percent of its capital in the stock of one or more corporations principally engaged in international or foreign financial operations other than banking, as well as such financial operations in dependencies or insular possessions of the United States, organized pursuant to 12 U.S. Code § 611 to 631.