My step-father lives in Florida and has just been diagnosed with Alzheimers dementia. He has a living trust that leaves his assets equally to all children and step-children. (Mom is deceased). One daughter has financial POA and another daughter has healthcare POA. If he is declared incompetent, would that "freeze" his trust/will "as is"? or Would the financial POA be able to change his will/trust for her benefit only?