An application under subsection (1) of section three for provision out of the estate of a deceased person may be made by or on behalf of all or any of the following persons, that is to say:

(a) The spouse of the deceased person;

(b) The children of the deceased person;

(c) The parents of the deceased person, if the deceased person dies without leaving a spouse or any children;

(d) A person whose marriage to the deceased person has been dissolved or annulled and who at the date of the death of the deceased person was receiving or entitled to receive maintenance from the deceased person whether pursuant to an order of a court, or to an agreement or otherwise; and

(e) A person whose significant relationship, within the meaning of the Relationships Act 2003 , with the deceased person had ceased before the date of the death of the deceased person and who was receiving or entitled to receive maintenance from the deceased person whether pursuant to an order of a court or to an agreement or otherwise.