Metal Detecting

What is the law on metal detecting in cemeteries in New York St?
I recently read article that metal detecting in old cemetaries can be quite productive, but there was no mention of any laws for any state. I was wondering if anyone knows what the rules for New York State might be. I would like to try this interesting hobby there.
It seems to me that it comes down to whether the cemetery is public or private. Ultimately, its not metal detecting that is the issue – it is whether you have the right to search the property for relics. If public, the metal detecting is probably OK, but it wouldn’t hurt to ask. If private, the answer is almost certainly “no way”.
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