FLAMMABLE VAPORS
KEEP LIGHTS AND FIRE AWAY
NO SMOKING
must be conspicuously posted at each approach to an "on deck" Division 2.1 (flammable gas) material stowage area and near each cargo hold ventilator leading to a hold containing this material. The sign must be painted on a white background using red letters. The letters may not be less than 8 cm (3 inches) high.
49 C.F.R. §176.220