I can tell you the vast majority of officials I come in contact have no facial hair. I do see some mustaches, but nothing else. I do see some officials with a beard but that is rare. Basically that standard is not as strict at the HS level, but rather strict at the college level. It was suggested to me to cut my beard in order to work for certain people, I have done that and was never hurt by that issue. Still have a clean mustache but I can do that.
Peace