The Massachusetts Public Health Council has approved a regulation requiring restaurant chains with 20 or more locations in the state to indicate calorie counts either on menus or menu boards.
 
The rule, which takes effect Nov. 1, 2010, affects about 50 chains with more than 5,000 locations, according to the Boston Globe.

California and New York have approved similar requirements.

In the Globe report, John Auerbach, the state’s public health commissioner, said the regulation should help consumers make more informed choices and fight obesity.