Sources for Domestic Freight Regulations

Uniform Freight Classification (Rail)
National Railroad Freight Committee
7001 Weston Parkway, Suite 200
Cary, NC 27513

National Motor Freight Classification (Truck)
Item 200 of the National Motor Freight ClassificationTM, published by the National Motor Freight Traffic AssociationTM, Inc.:
1001 N. Fairfax St., Ste. 600
Alexandria, VA 22314
Phone: 703-838-1810

Hazardous Materials Regulations
Code of Federal Regulations 
(CFR Title 49 – Department of Transportation)

Available from the US Government Printing Office or local Government Bookstore in most major cities.

Also available from:

5724 N. Pulaski Road
Chicago, IL 60646

International Maritime Dangerous Goods Code
International Maritime Organization
4 Albert Embankment
London SE1 7SR
United Kingdom
Phone: +44 (0) 20 7735 7611
Fax:     +44 (0) 20 7587 3241