California Code, Financial Code - FIN § 1251

(a) Make a tender offer for, a request or invitation for tenders of, or an offer to exchange securities for, any voting security or any security convertible into a voting security of a bank or a controlling person if the person making such tender offer, request or invitation for tenders, or offer to exchange securities would, by consummation thereof, directly or indirectly, acquire control of such bank or such controlling person.

(b) Solicit approval of any shareholder of a controlling person for a merger, consolidation, sale of assets, or other transaction by which any person other than such controlling person would acquire control of the bank controlled by such controlling person.

(c) Acquire control of a bank or a controlling person;  provided, however, that nothing in this subdivision shall be deemed to prohibit any person from negotiating to acquire (but not acquiring) control of a bank or a controlling person.