Where a county provides financial or accounting services to a special district, including a school district, and such district requests either:
the county may contract with such district for such services. The cost of the services shall be a lawful charge against the funds of the district. The term "financial and accounting services" includes, but is not limited to, the preparation and issuance of checks and warrants and the furnishing of the status of accounts.
Ca. Gov. Code § 25265