In South Australia, the Medical Treatment and Palliative Care Act (1995) allows a person over eighteen years of age to write an Advance Medical Directive will which is known as an Anticipatory Directive. However, this applies to a terminal illness only.
An Agent can also be appointed in South Australia as a person who can consent to the withdrawal/withholding of life-sustaining treatment, but not the withdrawal of provision/administration of food and water or pain-relieving drugs.
A State Register of Anticipatory Directives is operated by Medic-Alert, 216 Greenhill Road, Eastwood SA 5063, ph. 08 8274 0361.