What it means
An enduring power of attorney lets you appoint someone to make financial (and in some states, personal or property) decisions that continue even if you lose mental capacity. This is its key difference from a general power of attorney, which ends on incapacity. The rules, forms and what an enduring attorney can decide vary by state and territory, some combine financial and personal/health roles, others keep them separate. It must be made while you still have capacity.
How it's used
After his diagnosis, he made an enduring power of attorney so his daughter could manage his finances if his condition worsened.