Age
At bars and restaurants licensed to serve liquor, you can serve or bartend at 16, but until you turn 21 someone 21 or older must directly supervise you. Beer- and wine-only venues can hire you at 18 with no supervision rule, or at 16 or 17 with the state's prior approval and supervision by someone 21 or older.
W. Va. Code §60-7-12 W. Va. Code §11-16-18 WV ABCA: Age of Employment
