If you ship HazMat/Dangerous Goods by vessel in international waters, then you must comply with the regulations of the International Maritime Organization (IMO) and its International Maritime Dangerous Goods Code (IMDG Code).  But to comply you must make certain that you are using only the latest approved edition of the IMDG Code which is updated every two years.

From the above graphic you can see that the 2012 Edition of the IMDG Code acceptable for use through the end of 2015 must be replaced by the 2014 Edition which is then acceptable through the end of 2017.