California Code, Health and Safety Code - HSC § 44553

All moneys received pursuant to the provisions of this division, whether as proceeds from the sale of bonds, notes, or other evidences of indebtedness or as revenues, shall be deemed to be trust funds to be held and applied solely as provided in this division. Any bank or trust company with which these moneys shall be deposited shall act as trustee of these moneys and shall hold and apply the same for the purposes hereof, subject to regulations as the resolution authorizing the bonds of any issue or the trust agreement securing these bonds may provide.