The mayor and city council of a city of the second class or village board of trustees shall have no power to appropriate or to issue or draw any order or warrant on the city treasurer or village treasurer for money, unless the same has been appropriated or ordered by ordinance, or the claim for the payment of which such order or warrant is issued has been allowed according to the provisions of sections 17-714 and 17-715, and funds for the class or object out of which such claim is payable have been included in the adopted budget statement or transferred according to law.