A license holder shall ensure that: each employee in a supervisory capacity and each bartender be certified by an approved alcohol awareness program; and at least one certified individual be present on the licensed premises during the hours in which alcoholic beverages may be sold. A license holder who violates this section is subject to: for a first offense, a $100 fine; and for each subsequent offense, a fine not exceeding $500 or suspension or revocation of the license or both.