You people are being crazy.
There is no limit to what you could require on labels. You require food labels to state where the food was grown, what fertilizers and pesticides were used, what the phase of the moon was when it was harvested. And, some people might want to know that information. It shouldn't be required unless it's relevant to the consumer.
As I quoted before, this change would cost upwards of $700 million per year to adopt. Also, that number is from the pro-GMO labeling crowd. We could easily be talking about one billion dollars per year. And, it would have no benefit whatsoever for consumers. Not only that, non-GMO products already list that on their label! So, people who want non-GMO food can just buy food with a non-GMO certified label, problem solved. Why waste $700 million to solve a non-issue which, in fact, already has a solution?
Sources, I cannot imagine it being $700 million for a simple relabeling.