First instituted by Royal Warrant on 1 December 2014, it is awarded for 12 years service and a bar is awarded for each subsequent period of 9 years service. To qualify for the medal a member must have been:
- In service on or after 1 January 2012; and
- Have completed the required years of service (12 years for the medal; additional periods of 9 years for a bar to the medal) which may be continuous service or an aggregate and in more than one Parish or more than one office; and
- His or Her character and conduct must have been very good.