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 V 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, shall not be binding unless it has the approval in writing of the state department or agency with funds for that purpose or with the approval of the county department or agency with funds for that purpose.