新的RNAi和基因编辑产生的作物不需要标记：

In theory, that should apply to a great many products. After all, 90 percent of corn and soy grown in the United States has been genetically engineered for pest resistance or herbicide tolerance (or both). And some 75 percent of processed foods in our stores typically contain at least one ingredient made with GM crops, such as high-fructose corn syrup or soy lecithin.

In addition, 90 percent of cheese in the US is made with genetically engineered rennet. (Scientists do this so that rennet doesn’t have to be harvested from the stomach lining of calves.) There are also a small handful of fruits and vegetables that have been genetically modified, such as disease-resistant papaya.

That said, there is a bit of ambiguity in the bill’s text. It technically says food has to "contain" modified genetic material, not simply come from a crop that’s been genetically modified. Why does that matter? Because many oils and sweeteners that come from GM crops no longer contain the specific modified DNA after they’ve been processed. The bill’s opponents worry those ingredients might be exempt. The bill’s backers, including Stabenow, say they won’t be. Ultimately, the US Department of Agriculture will have authority under the bill to decide this.

What’s exempted: The bill will not mandate labeling for any traits developed through RNA interference or through gene editing. These newer genetic engineering techniques are becoming increasingly popular since they don’t always fall under existing regulations. (Take, for instance, this white button mushroom that had a gene silenced via CRISPR to prevent browning.) The USDA says it does, however, have the authority to label such foods if deemed necessary.

The bill would also not require labeling for any animals raised on genetically engineered feed (such as soy or corn). And it excludes foods served in restaurants.