903.04 WARNING LANTERNS FOR OBSTRUCTIONS.
   Every person receiving a permit as required by Section 903.03 shall, from the time of placing any material upon any street, sidewalk, lane, alley or public ground, place, keep and maintain at his expense at or near such material, not fewer than two signal lanterns and as many more as shall be necessary, and shall keep the same lighted so that the material or obstructions so placed can at all times or hours of the night be seen by persons passing or near such material or obstructions, and such signal lanterns shall be kept lighted every night from dusk until daylight the next day, as long as any material or obstructions so placed remain there.
(1964 Code §519.19)