Beginning June 1, 2017, nurse tanks will require placards identifying that it is carrying ammonia (UN 1005) on all four sides in a way that complies with Part 4 (Dangerous Goods Safety Marks) of the Transportation of Dangerous Goods (TDG) regulations. The two equivalency certificates that formerly allowed placards on the two long sides of a nurse tank (SH 6171 - Ren. 9, and SH 10006 - Ren. 5) will be discontinued on May 31, 2017.