For awards that are not posthumous, the pattern appears to be that the primary reference to their grade is the grade they held at the time of the award, with a parenthetical reference to the grade they held at the time of the action they are being recognized for.
An example here:
http://www.cmohs.org/recipient-detail/3216/anderson-webster.php
“Sfc. Anderson (then S/Sgt.), distinguished himself...”
Thanks for the info Duncan, but what uniform do they wear at their award ceremony? Their current rank or the rank they were when the valorous conduct took place?
Sadly, so many MOH awards are posthumous. I have met two men who earned it and survived; one of whom I knew fairly well.
Thank you for the link, Duncan. Yes, I see how the MOH Society refers to their current rank first and then their rank at the time of their valorous acts.
I appreciate you pointing that out to me.
You can see the response I received from the MOH Society at #28. You are right!