California Code, Financial Code - FIN § 1865

(a) In this section, “foreign bank” means any company organized under the laws of a foreign country, a territory of the United States, Puerto Rico, Guam, American Samoa, or the Virgin Islands, which engages in the business of banking, or any subsidiary or affiliate, organized under such laws, of any such company.  “Foreign bank” includes, without limitation, foreign commercial banks, foreign merchant banks, and other foreign institutions that engage in banking activities usual in connection with the business of banking in the countries where such foreign institutions are organized or operating.

(b) Except as otherwise provided in subdivision (c), a majority of the shares of the capital stock of any corporation shall at all times be held and owned by citizens of the United States, by corporations the controlling interest in which is owned by citizens of the United States, chartered under the laws of the United States or of a state of the United States, or by firms or companies, the controlling interest in which is owned by citizens of the United States.

(c) Notwithstanding the provisions of subdivision (b), one or more foreign banks, institutions organized under the laws of foreign countries which own or control foreign banks, or banks organized under the laws of the United States, the states of the United States, or the District of Columbia, the controlling interests in which are owned by any such foreign banks or institutions, may, with the approval of the commissioner and upon such terms and conditions and subject to such rules and regulations as the commissioner may prescribe, own and hold 50 percent or more of the shares of the capital stock of any corporation.