(2) A person who sells tobacco products, vapor products, or alternative nicotine products at retail shall post, in a place close to the point of sale and conspicuous to both employees and customers, a sign produced by the department of health and human services that includes the following statement:
"The purchase of a tobacco product, vapor product, or alternative nicotine product by a minor under 21 years of age and the provision of a tobacco product, vapor product, or alternative nicotine product to a minor are prohibited by law. A minor who unlawfully purchases or uses a tobacco product, vapor product, or alternative nicotine product is subject to criminal penalties.".