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.