I was considering honorifics and I realized that sometimes we include and sometimes we omit a possessive in front of them.
I was wondering if there was a formal rule for such?
Your highness, the French delegation has arrived.
Highness, the French delegation has arrived.
Obviously, the your has been omitted here (or perhaps elided).
But, there are other honorifics where this is never done. For example: when addressing the mayor or a judge (in AmE), you might say "Your Honor", but you'd never say, "Honor". Rather, you'd say Mr. Mayor or Judge in those cases.
Is there a rule to this, or is merely that your has been elided in the above example, and it should have been written with an apostrophe:
'Highness, the French delegation has arrived.
Note: I'm deliberately ignoring the honorifics that never carry a possessive: Mr., Mrs., Dr., etc.