No official Advance Health Directive document exists, although various associations and societies, such as association Dignity in Dying, provide standard living will forms.

In order an Advance Directive to apply to life sustaining treatment, it must be in writing,  signed and witnessed, and contain a statement that it is to apply even where life is at risk.

Documents should be signed and dated by at least one witness of legal age. Relatives or individuals who may benefit from the testament of the patient may not act as witnesses.