Missouri Revised Statutes Title XVI. Conservation, Resources and Development § 253.050. Obligations incurred only as authorized by appropriation

Except as, or as hereafter may be, otherwise provided by law no contract shall be entered into or obligations incurred, nor shall any payment or expenditure of money be made under the provisions of sections 253.010 to 253.100 except in accordance with and by virtue of, an appropriation as provided by law.