Medal instituted on 16 February 1973. The design was changed in 1999.
Medal awarded to members of the Armed Forces who was engaged in service in an area outside Singapore after 9 August 1970 which satisfies one or more of the following conditions: service of 96 hours or more in operations;
aggregate service of 30 days or more, in a period of 12 months when employed in support of any unit engaged in operations; service of 14 days or more when engaged in operations involving the keeping of peace, restoring of law and order, provision of humanitarian aid or rescue, or relief operations in support of any foreign government.
Prior to 1999, separate ribbons indicated service on Operational or Non-operational service. A bronze star is added to ribbon if the service involves hostile action or considerable personal risk.