§ 35.07 DEMAND WARRANTS; LIMITATION.
   Warrants payable on demand shall be issued upon the City Treasurer only when, at the time of the drawing and issuing of the warrants, there is sufficient money in the appropriated fund to pay the warrants.
(ILCS Ch. 65, Act 5 § 8-1-9) (‘69 Code, § 2- 12)