I’m curious.... last rites AFTER the person has died, does it still apply?
This is done because no one actually knows when the soul leaves the body. So the last rites are administered even though the person is dead in case the soul is still part of the body. There’s no way of actually knowing, so it is done on the assumption that the soul is still salvageable.
http://www.freerepublic.com/focus/religion/2085230/posts?page=10#10
I think Mrs. Don-O has your answer.
Extreme Unction can be administered within a few hours of death. It depends on the priest. Some utilize a more strict timeframe than others.