This is a written document by which you (the “appointor”) appoint another person (the “agent”) to be your medical attorney under section 5A(2) of the MTA. This gives them the authority to make decisions about medical treatment on your behalf, if you are unable to do so because of disability. You can also appoint an alternate agent, if your appointed agent is unavailable, dies or is incapacitated.
The document must take the form shown in schedule 2 of the MTA. It must have two witnesses, not including you, your agent or alternate agent. One must be authored to witness the signing of statutory declarations. When a person executes an Enduring Power of Attorney (Medical Treatment), any earlier Power of Attorney (Medical Treatment) given by that person ends (s 5A(2)(a)).
Enduring power of attorney (medical) only takes effect if you become incompetent to make decisions (s 5A(2)(b)). Your alternate agent only becomes your agent if your appointed agent is dead, incompetent, cannot be contacted or their whereabouts are unknown (s 5A(2)(c)). Before an alternate agent can make any decisions, they must sign a statutory declaration giving details about the appointed agent’s unavailability, and the efforts made to find them (s 5AA).
The document gives your agent full power to make any medical decisions that you can make, while you are competent to do so. This includes the right to refuse any medical treatment whatsoever, except for “palliative care” (which includes the provision of reasonable medical procedures for the relief of pain, suffering and discomfort, and the reasonable provision of food and water). In the case of Gardner; re BWV  VSC 173, feeding a person through a tube into their stomach was found to be medical treatment, and not palliative care.
For an agent to refuse treatment on your behalf, they must sign a Refusal of Treatment Certificate, which must take a particular form (sch 3 MTA). An agent may refuse treatment on two grounds, either:
•the medical treatment would cause you unreasonable distress, or
•the agent believes on reasonable grounds that you, if competent, and after giving serious consideration to your health and wellbeing, would consider the medical treatment unwarranted.
In the certificate your agent acknowledges that they have been properly informed of and understand your health condition to make this decision to refuse treatment. This is verified by a registered medical practitioner and another person.