Let me show you a calculation of what that looks like.That is patently crazy. Completely outside the realm of sound tax policy. That is akin to saying you are required to pay NY tax on your vacation pay if you go to NY for vacation.
Unenforceable, ludicrous, and doomed to failure in either Administrative Hearings or Courts.
The average salary of a pulmonary and critical care physician is $250k.
So they make about 20.8k per month gross. NYS tax is about 8.8% and NYC tax is 2.8% on top of that.
So for a specialist volunteer who came to NYC for a month to help, they'd owe NY and NYC about $2600 for the privilege.