The governing board of each school district shall be responsible for filing or causing to be filed with the county superintendent of schools the verified signature of each person, including members of the governing board, authorized to sign orders in its name. Except for districts determined to be fiscally accountable pursuant to Section 42650, no order on the funds of any school district shall be approved by the county superintendent of schools unless the signatures are on file in his office and he is satisfied that the signatures on the order are those of persons authorized to sign the order.