S-2.1, r. 4 - Safety Code for the construction industry
3.10.19. Long loads: When a load extends more than 900 mm from the rear of a truck, the end of the load shall be indicated by:
(a) a square red flag during the day, at least 300 mm along its sides; or
(b) a flashing amber light at night.
R.R.Q., 1981, c. S-2.1, r. 6, s. 3.10.19.