NYC restaurant chains must post high-sodium warnings

New York

NEW York City is facing an imminent challenge to a new rule requiring restaurant chains to post warnings on dishes with high amounts of salt, the latest battle in its campaign to improve public health on the fast-food front.

The city has already banned trans fats and required menus to list calorie counts, though it lost in its bid to limit the size of sugary drink servings. Now the National Restaurant Association says it's planning to sue to block the sodium rule, which went into effect on Tuesday.

The regulation places an "overly onerous and costly burden" on eateries already dealing with higher costs from Governor Andrew Cuomo's plan to create a US$15 minimum wage f…