According to this AP article, the FDA is having trouble finalizing the rules for menu labeling required by the 2010 Affordable Care Act. Here's an excerpt:
Diners will have to wait a little longer to find calorie counts on most restaurant chain menus, in supermarkets and on vending machines. Writing a new menu labeling law "has gotten extremely thorny," says the head of the Food and Drug Administration, as the agency tries to figure out who the law should cover. The 2010 health care law charged the FDA with requiring restaurants and other establishments that serve food to put calorie counts on menus and in vending machines. The agency issued a proposed rule in 2011, but the final rules have since been delayed. ... While the restaurant industry has signed on to the idea and helped to write the new regulations, supermarkets, convenience stores and other retailers that sell prepared food say they want to no part of it. "There are very, very strong opinions and powerful voices both on the consumer and public health side and on the industry side ..., FDA Commissioner Dr. Margaret Hamburg said in a recent interview with The Associated Press.