Some info from the other thread in which it was discussed
"It's the United Nations Environment Programme which debates these things (www.unep.org).
The next debate happens 13-18th January in Geneva.
It appears they asked the WHO for input on thimerosal in vaccines, and the statements they have are all linked here: http://www.unep.org/hazardoussubstances/Portals/9/Mercury/Documents/INC5/WHO%20Submission%20for%20Mercury%20INC5_18%20December%202012.pdf"
Also I found this commentary in pediatrics about it this morning