One of the New York Mafia families’ rules is that the members aren’t allowed to grow facial hair.
“Omertà” – is the oath or “code of silence”, never talk to the authorities.
“Ethnicity” – only men of Italian descent are allowed to become full members (made men). Associates, partners, allies etc. have no ethnic limits.
“Family secrets” – members are not allowed to talk about family business to non-members.
“Blood for blood” – if a family member is killed by another member, no one can commit murder in revenge unless the boss gives permission.
“No fighting among members” – from fist fights to knife fights.
“Tribute” – every month; members must pay the boss; also giving the boss a cut on any side deals.
“Adultery” – members are not allowed to commit adultery with another family member’s wife.
“No facial hair” – members were not allowed to grow mustaches; part of the Mustache Pete way.