Civilian Prohibitions
Professional airline pilots are required to be clean shaven to facilitate a tight seal with auxiliary oxygen masks. Similarly, firefighters may also be prohibited from full beards to obtain a proper seal with SCBA equipment. This restriction is also fairly common in the oil & gas industry for the same reason in locations where hydrogen sulfide gas is a common danger.
Isezaki city in Gunma prefecture, Japan, decided to ban beards for male municipal employees on May 19, 2010.
Brigham Young University generally requires its students and employees to be clean-shaven. However, Brigham Young himself was often seen with beard.
The Eighth Circuit Court has found requiring shaving to be discriminatory.
Read more about this topic: Beard, Modern Prohibition of Beards