As per the latest press release by New York State:
Governor Andrew M. Cuomo today announced that 10 additional states meet the metrics to qualify for the travel advisory requiring individuals who have traveled to New York from those states, all of which have significant community spread, to quarantine for 14 days. The newly-added states are Alaska, Delaware, Indiana, Maryland, Missouri, Montana, North Dakota, Nebraska, Virginia and Washington. The quarantine applies to any person arriving from a state with a positive test rate higher than 10 per 100,000 residents over a 7-day rolling average or a state with a 10 percent or higher positivity rate over a 7-day rolling average.
Does this quarantine also apply to someone traveling from outside the US? Neither the press release nor the original executive order mention anything about foreign travel.
NB: this question is purely about the legal requirement of quarantine. Let's avoid discussing whether or not voluntary quarantine is a good idea or not.