Hello, I have a question regarding property lines and trees. We have a diseased Dutch Elm Tree that is over 80 years old, that is located near our property line. The trunk of the elm tree is approximately 10 % on our land and 90% on the adjacent land owner. The tree is forked so that it is especially vulnerable to disease and unfortunately has contracted Dutch Elm disease and will need to be removed. The limbs are almost exclusively over the adjacent property (approx 95%). The adjacent property owner has until recently been the total caretaker of this tree and has expended money on curative injections to ward off dutch elm disease. I anticipate the need to have this very large tree cut down this summer. What percentage of the cost of its removal will I need to share? Would it be 10% or 50% or none at all? I reside in the State of Illinois. Thank you for your advice in advance.