The FDA has submitted new rules governing gluten-free food labeling for final White House review. The agency has been developing the rules since 2005. It says products can be labeled gluten-free if they do not contain whole or hybrid wheat, rye or barley; wheat flour or other such products that have not had gluten removed; or any ingredient composed of more than 20 parts per million of gluten. The Hill/RegWatch blog (2/26)