I think this comes under an oral law in the tradition of men (pharisees), although no action can be taken, council is often given to check on the standing of the brother who grew the beard, and indeed it can affect his 'priviledges' in the congo. It is usually something up held by the local congregation members, comments you hear and such like. In my hall one or two had beards over the years including myself, but were never used. One teenage lad an MS grew a goatee, and was to do an Assembly part, and was asked to shave it off which he promptly did.
CS 101