Exception from Full Regulation, PHMSA HazMat Transportation Regulations 49 CFR 173.6 – The Materials of Trade Exception Daniel Stoehr September 28, 2013 ← 40 CFR 261.4(a)(9) – The Hazardous Waste Exclusion for Spent Wood Preservatives 40 CFR 261.4(a)(5) – The Hazardous Waste Exclusion for In Situ Mining Waste →