You might check out the Biersack ruling on 12/06/04 in Ohio. The appellate court said that Ohio law doesn't require evidence{written} of specific focus on food and fluids, and that witness testimony was sufficient. Mrs. Biersack had no living will and it was only the testimony of her family that would allow the feeding tube to be removed. The court did say it would still require 2 doctors to agree on this though and didn't find that in this case. Interpretation of the law is an amazing thing, huh?
In any case, my husband and I will be working on our living wills (which we should have had long ago).........just to be specific, and to make it clear what we want.