Wolfish no offense but thats REALLY a strange requirement, of all things!
im no posek but from what i know it’s assur to shave. Period.
Obviously, the administration of my son’s yeshiva disagrees with you. Here’s the relevant section of the student handbook (emphasis mine):
Additionally, on certain special occasions, such as a visit by a Talmid Chacham, special Yeshiva functions and Rosh Chodesh, talmidim will be required to demonstrate proper kavod by wearing a solid white shirt and tie.
deemed inappropriate by the Administration.
The Wolf