Mo. Rev. Stat. § 86.307: Treasurer, custodian of assets — payments from, made how.

The treasurer of the cities shall be the custodian of the assets of the retirement system. The treasurer shall make payments from such assets only upon vouchers signed by two persons designated by the board of trustees. A duly attested copy of the resolution of the board of trustees designating such persons and bearing on its face specimen signatures of such persons shall be filed with the treasurer as authority for making payments upon such vouchers. No voucher shall be drawn unless it shall previously have been allowed by resolution of the board of trustees.