Existing law makes it a misdemeanor for a person or a firm, corporation, or association, or any employee thereof, to engage in false or misleading advertising practices. Existing law makes various unfair competition practices unlawful, including any unlawful, unfair, or fraudulent business act or practice and unfair, deceptive, untrue, or misleading advertising. This bill would make it an unlawful advertising practice for a person to create and cause to be published in an advertising medium an advertisement that prominently includes a synthetic performer without a clear and conspicuous disclosure that the advertisement includes a synthetic performer. The bill would prohibit an advertising medium from transmitting, distributing, displaying, airing, or otherwise making available an advertisement containing a synthetic performer if a court of competent jurisdiction has issued an order finding that the advertisement violates the bill's provisions or enjoining the creator from publishing the advertisement, and the advertising medium is served with the order, as specified. The bill would define various terms for these purposes. By expanding the scope of a crime, the bill would impose a state-mandated local program. The California Constitution requires the state to reimburse local agencies and school districts for certain costs mandated by the state. Statutory provisions establish procedures for making that reimbursement. This bill would provide that no reimbursement is required by this act for a specified reason.