Foodmakers will soon be required to disclose when their products contain genetically modified ingredients - but those labels may not be as obvious, or as comprehensive, as consumers expected. A proposed rule released by the Agriculture Department ... instructs foodmakers to use the term "bioengineered" to label such foods instead of "genetically modified." The proposed rule ... will now undergo a public comment period and could be finalized as early as this summer. Congress passed a mandatory-labeling law in 2016. Food companies will have three options for disclosing the ingredients, the USDA said: a one-sentence label declaration, such as "contains a bioengineered food ingredient"; a standardized icon, such as the one used in the National Organic Program; or a QR code or other digital marker that directs shoppers to a website for more information. Under one plan, the USDA said it would exempt highly refined sugars and oils, such as those made from genetically modified corn, soybeans and sugar beets, from labeling. This would effectively exempt as much as 70 percent of covered food products from GMO labeling. Under another plan, the USDA would exempt products containing ingredients from mixed sources that were less than 5 percent genetically modified by weight. That ... is significantly higher than the 0.9 percent threshold observed by China, Russia and the European Union.