It shall be unlawful for a licensee under this section to allow the sale of tobacco, tobacco products, or tobacco related devices by any means whereby the customer may have access to such items without having to request the item from the licensee or the licensee’s employee and whereby there is not a physical exchange of the tobacco, tobacco product, or the tobacco related device between the licensee, or his or her clerk, and the customer. All tobacco, tobacco products, and tobacco related devices shall either be stored behind a counter or other area not freely accessible to customers, or in a case or other storage unit not left open and accessible to the general public. Any retailer selling tobacco, tobacco products, or tobacco related devices at the time this section is adopted shall comply with this section within 90 days.