Cal. Gov. Code § 29951

The intent of this article is that investments of county funds shall be made for the purpose of: (a) aiding and facilitating the making of needed public improvements in the county; (b) limiting or preventing the increasing of district taxes or assessments which may lessen or impair the general tax revenues of the county from any district; and (c) providing means by which district indebtedness or assessments represented by or securing bonds may be reduced.