Quoting clotted...
It is part of the rules for the operation of the aircraft that a person who occupies an emergency exit row seat be willing and able to open the emergency exit doors. That's what they're there for.
So, I am in an emergency exit on a flight from Sydney to Perth, I've had a big day and decide to have a few as the missus is picking me up at the other end.
After about five beers and no lunch I am feeling a bit tipsy so I think I could go a few more.
My question clotted, I may be still willing but am I still able and who decides that I am no longer capable, or that I should move and where to on a full flight ?