California Code, Government Code - GOV § 971.2

(a) All judgments for which a local public entity is liable are legal investments for all trust funds, and for the funds of all insurance companies, banks (both commercial and savings) and trust companies, and for every other local public entity within this state, to the same extent as bonds of the local public entity liable for the judgment.

(b) Whenever any money or funds may by law be invested in or loaned upon the security of bonds of a local public entity, such money or funds may be invested in or loaned upon the security of a judgment for which such local public entity is liable;  and whenever bonds of a local public entity may be used as security for the faithful performance or execution of any court or private trust or of any other act, a judgment for which such local public entity is liable may be so used.

(c) All judgments for which a local public entity is liable, to the same extent as bonds of such local public entity, are legal for use by any state or national bank or banks in the state as security for the deposit of funds of any local public entity within this state.