Cal. Fam. Code § 7905

The officers and agencies of this state and its subdivisions having authority to place children are hereby empowered to enter into agreements with appropriate officers or agencies of or in other party states pursuant to paragraph (b) of Article 5 of the Interstate Compact on the Placement of Children. Any such agreement which contains a financial commitment or imposes a financial obligation on this state or subdivision or agency thereof is not binding unless it has the approval in writing of the Controller in the case of the state and of the chief local fiscal officer in the case of a subdivision of the state.