84.750. No order or voucher which involves a commitment toexpend money shall be issued unless it bears the signature of thesecretary of the board certifying that a sufficient unexpendedand unencumbered appropriation balance remains in the amountappropriated for such purpose in the board budget. Any order orvoucher not so certified shall be void and shall not be paid.
(L. 1943 p. 727 ยง 7675)