Arkansas constitution
Article 5: legislative department
Section 27

No extra compensation shall be made to any officer, agent, employee, or contractor, after the service shall have been rendered, or the contract made; nor shall any money be appropriated or paid on any claim, the subject matter of which shall not have been provided for by preexisting laws; unless such compensation, or claim, be allowed by bill passed by two-thirds of the members elected to each branch of the General Assembly.