There are a few rules relating to the wearing of Tercentenary Jewel which can be worn from the 24 June 2016.
The Jewel can be worn by any member of UGLE who is a member between the 24 June 2016 and 31 December 2017. It can only be worn by Master Masonsand above. Anyone initiated between those dates can purchase the Tercentenary Jewel but will not be eligible to wear it until they have been raised. The Jewel can be worn by Master Masons, Masters and Past Masters and Grand Officers.
The Royal Arch Jewel should be worn closest to the centre of the body and it is recommended that the Tercentenary Jewel be worn along from the Royal ArchJewel. It would therefore take precedence over a Past Master’s or Founder’s Jewel. The Tercentenary Jewel should not be worn at Royal Arch meetings.
The MW Pro Grand Master in his address at the Quarterly Communication in June 2016 encouraged Grand Officers to wear the Tercentenary Jewel during the Tercentenary year and that they should continue to wear it in perpetuity if they so wished.