VFE - sorry, couldn't work out if that was sarcastic or not!!
Reason for asking is that I was asked to go to work to send a student 1st solo x/c. There was an FI(R) on duty, who was being supervised by an instructor from next door.
Looking back at Whopity's post regarding SRG 1187, I doubt he was listed on the paperwork as a supervising instructor. It's one of those situations that will bite you back if there is an incident.
I should know what the requirements are, but genuinely don't.