There are several types of Powers of Attorney and Advanced Care Plans that can be put in place which vary depending on where you live.
Advanced Care Planning is where you share your beliefs, values and preferences with your loved ones and your health care team. If you are in a situation where you are unable to make decisions about your care, the Advanced Care Plan will guide those who are caring for you to make decisions about your treatment. It gives you control.
An enduring Power of Attorney is where you appoint someone to make financial and personal decisions on your behalf if you become unable to make your own decisions such as if you have failing cognitive health or lose capacity to make decisions through an illness.
Everyone regardless of age of health status should have an advanced care plan and an enduring power of attorney so that your wishes and preferences are respected and there is someone that can look after your affairs if you become unable to do so.