However, it is also unofficially known as the Territorial Decoration, the name of its predecessor. The Royal Warrant of 23 September 1930 was amended by Royal Warrants dated 1 February 1940, 4 April 1946, 8 April 1949, 8 August 1949 and 6 August 1951. On 17 November 1952, these earlier warrants were annulled and, along with some new amendments, incorporated in one new Royal Warrant. Award criteria The decoration could be awarded to part-time officers after twenty years of commissioned service, not necessarily continuous, as an efficient and thoroughly capable officer on the active list of the Territorial Army or of any other Auxiliary Military Force of the British Empire. Half of the time served in the ranks could be reckoned as qualifying service for the decoration. Service in West Africa, natives of West Africa and periods spent on leave excluded, and war service was reckoned two-fold as qualifying service for the decoration. The award could also be made to any Princes or Princesses of the Blood Royal. The equivalent award for other ranks was the Efficiency Medal. Recipients serving in the Territorial Army of the United Kingdom are entitled to use the post-nominal letters TD, while recipients serving in the Auxiliary Military Forces are entitled to use the post-nominal letters ED. A recipient who had earlier been awarded any Long Service and Good Conduct Medal or the Efficiency Medal or a clasp to either for service in the ranks, was not permitted to wear the medal or clasp together with the decoration until the full service periods prescribed for each medal or clasp and the decoration had been completed. From 1949, the required period of qualifying service was reduced to a minimum twelve years of commissioned service in the Territorial Force and the Auxiliary forces of the Commonwealth. In respect of officers whose service terminated before 3 September 1939, the qualifying period of commissioned service remained twenty years. At the same time, a clasp was instituted which could be awarded upon the completion of each further period of six years of qualifying service. The maximum number of clasps awarded to one recipient is five. Order of wear In the order of wear prescribed by the British Central Chancery of the Orders of Knighthood, the Efficiency Decoration takes precedence after the Ceylon Armed Services Long Service Medal and before the Territorial Efficiency Medal. Description The decoration is an oval skeletal