California Code, Financial Code - FIN § 1329

(a) In this section, “subject person,” when used with respect to a bank, means any director or officer of the bank, any controlling person of the bank, or any director or officer of a controlling person of the bank.  For purposes of this subdivision, “controlling person” has the meaning set forth in subdivision (c) of Section 1250.

(b) No bank shall purchase any real or personal property or any interest in real or personal property, including, but not limited to, a leasehold, or any contract arising from the sale of real or personal property or any note or bond in which any subject person of such bank is personally or financially interested, directly or indirectly, for such person's own account, for such person, or as the partner or agent of others, without the prior approval by the board of directors of the bank and for not more than the current market value of the property purchased.