No extra compensation shall be made to any officer, public agent, or contractor, after the service shall have been rendered, or the contract entered into; nor, shall any money be paid on any claim, the subject matter of which shall not have been provided for by preexisting laws, and no public money or property shall be appropriated for local, or private purposes, unless such appropriation, compensation, or claim, be allowed by two thirds of the members elected to each branch of the general assembly.
Structure Iowa constitution