In PA a new regulation was just passed that all popup blinds and tree stands on State Game Lands and any other land that is involved in the Game Commissions public assess programs and there are over a million acres in each, must be labeled with the owners name and address or the CID number from the hunting license or a special number that can be applied for, on a durable material and legible to read. Stands and portable blinds may be put out a few days prior to the season in which used and removed a few days after the season ends. It is also not legal for tree stands to do damage to trees. If I had my way, stands would not be allowed to be left in the woods on public land because it gives the owner a false sense of having sole hunting rights to an area and just causes problem and squabbles.