Am I allowed to park my Ford E350 Cargo Van on residential areas in NYC?

There are restrictions for parking commercial vehicles on residential areas from 9pm-5am in NYC. My Ford E350 cargo van is for personal use only. My license plates don't say commercial, but my friend claims it falls under commercial vehicle even though I do not do business with it. Can anyone clarify this for me thanks

Your friend does not know what he is talking about. You should be able to park where it is permissible (of course you may have to move it from one side to another for street sweeping).