19. Air and water hydrants on an Alpine ski slope or in the area bordering the slope that is cleared of trees shall be indicated by means of an orange flag at least 250 cm2 in size, displayed at least 1.5 m above each such hydrant.
If an air hydrant and a water hydrant are less than one metre apart, a single flag is sufficient to indicate their presence.
O.C. 1788-88, s. 19; M.O. 2011-06-15, s. 6.