Enduring Powers of Attorney are used by people (the donor) who need someone (the donee) to intervene in looking after their financial affairs because they are unable to do so themselves. It is an important part of planning for the orderly conduct of the donor affairs. A power of Attorney ceases on death.
We recommend putting one in place to guard against the unexpected and the link below should explain a bit more.
http://www.lawhandbook.sa.gov.au/ch02s01.php
Always consult your solicitor.