625 ILCS 45/4-4
(Text of Section before amendment by P.A. 104-137)
Whistles.) It is unlawful to operate a motorboat without a mouth, hand or power operated whistle, horn or other appliance, capable of producing a blast of 2 seconds or more duration and audible for at least one-half mile.
(from Ch. 95 1/2, par. 314-4)
(Source: P.A. 82-783.)