The Reserve Force Decoration may be awarded to an officer who has, on or after 14 February 1975 and before 20 April 1999, completed 15 years efficient remunerated commissioned service in the Reserve Forces. A minimum of 12 years as a commissioned officer in the Reserve and up to 3 years as a commissioned officer in the Regular Forces (to total 15 years) can be counted towards the medal only.
 
Clasps are awarded for each additional period of five years efficient commissioned Reserve service after qualifying for the medal. Regular service does not qualify towards clasps for this award.
 
From 20 April 1999 the Reserve Force Decoration was replaced by the Defence Long Service Medal. However, clasps can still be issued in accordance with the eligibility criteria.