49 CFR 172.504 contains the HMR’s General Placarding Requirements.  It is here where the Placarding Tables 1 & 2 are found [§172.504(e)] and the explanation of the DANGEROUS placard option at §172.504(b).  Here also is the shocking exception from displaying a placard for a non-bulk packaging of a hazardous material from Placarding Table 2 if the aggregate gross weight of vehicle HazMat is <1,001 lbs.  But the purpose of this article is to explain and illustrate the exception from placarding for the NON-FLAMMABLE GAS placard on a transport vehicle pursuant to 49 CFR 172.504(f)(3). (more…)