The 17th revised edition of the UN Recommendations on the Transport of Dangerous Goods (ie Model Regulations or the UNRoTDG) is now available online in English and French.

This document, the Orange Book, is a non-binding framework of transport regulations and not an officially enforced international or regional law. The transport carrier agencies do use it as a guide for their legally binding regulations for air/land/sea/regional DG transportation (eg US DOT, TC/TDG, ADR/RID, IATA/ICAO, IMO/IMDG, etc.) but can and do deviate from it.