For very formal occasions when formal titles are used and modern social casual norms are ignored, what titles can be used for those who don't identify with a gender? Sir, ma'am, ? Mr., Mrs, Miss, Ms, ? Madam, Mister, ? Lady (ladies), gentleman (gentlemen), ? And since the military now allows transgender individuals, what title (sir/ma'am) is used to address a "third gender" officer?
I've heard Mx used as an alternative to Mr/Mrs etc. Lady or gentleman could be substituted for "individual" or simply "person". I'm not sure about the others though.
I plan to change my name legally and will probably use Mx. As that is what can be used in the UK. Not sure about plurals and upper echelons
Also, Mx can be produced Mix or Mux. I prefer Mux personally because Mix sounds too much like Miss to me.