Mo. Rev. Stat. § 84.750
Current with changes from the 2023 Legislative Session
No order or voucher which involves a commitment to expend money shall be issued unless it bears the signature of the secretary of the board certifying that a sufficient unexpended and unencumbered appropriation balance remains in the amount appropriated for such purpose in the board budget. Any order or voucher not so certified shall be void and shall not be paid.
§ 84.750, RSMo