A claim under subsection 14(1) for a pension for a veteran or for a dependant of a deceased veteran, an application under subsection 15(1) for an increase in the rate of pension payable to a veteran or an application under subsection 15(2) for a pension for a veteran may be made:
(a) by the veteran or dependant, as the case may be;
(b) with the approval of the veteran or dependant, as the case may be, by another person on behalf of the veteran or dependant;
(c) in the case of a veteran or dependant, as the case may be, who is unable, by reason of physical or mental incapacity, to approve a person to make the claim or application on his or her behalf--by another person, being a person approved by the Commission, on behalf of the veteran or dependant; or
(d) in the case of a dependant who is under the age of 18 years:
(i) by a parent or guardian of the dependant;
(ii) by another person approved by a parent or guardian of the dependant; or
(iii) if there is not a parent or guardian of the dependant alive, or willing and able to make, or approve a person to make, such a claim or application on behalf of the dependant--by another person, being a person approved by the Commission;
on behalf of the dependant.