22. It shall be lawful for the Armed Forces Council to require or permit, as the case may be, a member serving in the pensionable service to retire —
if he is considered to be unsuitable, such unsuitability being due to causes not within his control or due to causes within his control that do not amount to misconduct;
on a certificate from his commanding officer and on medical evidence to the satisfaction of the Armed Forces Council that the member is incapable by reason of infirmity of mind or body of discharging his duties and that such infirmity is likely to be permanent;
if his retirement is considered by the Armed Forces Council to be desirable in the public interest, having regard to the conditions and needs of the armed forces and the usefulness of the member thereto;
where the Armed Forces Council considers that he has made outstanding contributions to the Singapore Armed Forces and that he should retire as part of the process of leadership renewal in the Singapore Armed Forces;
where such member has been superseded for further promotion;
if, on or after completing 15 years of service, requests the permission of the Armed Forces Council to retire; or
if he requests the permission of the Armed Forces Council to retire in circumstances not covered in the preceding paragraphs.