If a vessel is moored, no person may transfer to or from a portable tank or IBC a product with a flashpoint of less than 300 [deg]F unless the person in charge displays at each gangway or access that is open for use a warning placard containing the following in letters 2 inches in height or larger:
WARNING
No open lights
No smoking [CGD 73-172, 39 FR 22954, June 25, 1974, as amended by USCG-2011-0088, 78 FR 54787, Sept. 6, 2013]