To all and singular do We, <King> and <Queen>, by Right of Arms of the Realm of Artemisia and of all Our territories King and Queen, send greeting. In recognition of Our subject, <name>, who by his valor and skill at arms has twice ruled as King in Our realm, do We now elevate him to the rank and station of Duke. We now further affirm his right to bear arms by Letters Patent in the Society for Creative Anachronism, without let or hindrance, said arms herein more plainly described and depicted to wit: <blazon>. In witness whereof We set Our hands and cause to be affixed the seal of Our mighty Kingdom this ___ day of ___, Anno Societatis ___, being the year two thousand Gregorian.
Rex Gryphus Regina
[Source: Kingdom of Artemisia Scribal Handbook Part II (pdf)]