Advance Directives can give a senior the voice to know feelings and wishes about end of life care are communicated and honored. These documents can assist in ensuring that medical decisions are in line with the senior's wishes.
This reduces the chance for being given too many treatments or perhaps not enough. It also reduces the potential for stressful decision making in time of crisis for seniors, their families, and caregivers.
Each state has its own rules and regulations about needed documents. When a senior moves to another state it is important to review these documents in the context of their new home.
It would be equally important for a senior to review their documents from time to time, due to changing feelings about one's circumstances and lifestyle.