First of all, I can't speak on behalf of the Sodium Working Group, although I was a member of that.
The recommendations in the Sodium Working Group report were consensus recommendations in that we all kind of grinned and bore it. They recommended sodium reduction limits on a voluntary basis. That approach was contradicted by a report that was published last April by the U.S. Institute of Medicine, which is a highly respected scientific organization that Health Canada relies upon quite a lot for designing nutrition policy. They were dismissive of the idea of using voluntary targets. They didn't think they would work very well.
Second, a few weeks after the Sodium Working Group report came out, the provincial and territorial ministers of health issued a communiqué saying that they thought the federal government should develop mandatory targets from the outset and should at least be prepared to go the mandatory route if it becomes clear that there won't be compliance.