New York City this week became the first government in the nation to require sodium warning notices on menu items that exceed the recommended daily limit of 2300 mg of salt.  The requirement, which was adopted by the city Health Board back in September, officially became effective this past Tuesday, December 1, although the fines and penalties prescribed for violators ($200 per violation) will not be assessed until March 1, 2016.  The requirement applies only to chains with at least 15 restaurants operating across the country.  The National Restaurant Association, which successfully sued to overturn the sugary drink ban the Health Board imposed back in 2012, has announced that it plans to challenge this initiative in court as well.