(1) A person who engages in the business of selling or keeping for sale alcoholic liquor in violation of this act, whether as owner, clerk, agent, servant, or employee, is equally liable, as principal, both civilly and criminally, for the violation of this act.

  (2) A person or principal is liable, both civilly and criminally, for the acts of his or her clerk, servant, agent, or employee, in violating this act.