(1)

(a) A designated healthcare representative has, by virtue of this paragraph, the power to ensure that the terms of the advance healthcare directive are complied with.

(b) A directive-maker may, in his or her advance healthcare directive, confer on his or her designated healthcare representative one or both of the following powers:

(i) the power to advise and interpret what the directive-maker's will and preferences are regarding treatment as determined by the representative by reference to the relevant advance healthcare directive;

(ii) the power to consent to or refuse treatment, up to and including life-sustaining treatment, based on the known will and preferences of the directive-maker as determined by the representative by reference to the relevant advance healthcare directive.