This section establishes a hierarchy of persons to assume the role of “default nominated person” of a person who is aged 16 or over, in circumstances where a nominated person has not been appointed either by the person themselves (under section 70) or by the Tribunal (under section 81). Where there is only one person falling within the said list, that person will be the default nominated person. Where there is more than one person, the person highest up the list will be the default nominated person. Section 74 includes further provision regarding the list where more than one person is highest up the list.