Any person who distributes tobacco or tobacco products within this state shall post conspicuously and keep so posted at each location of distribution and vending machines a sign that is placed in such a manner that it is likely to be read by those seeking to purchase or obtain tobacco or tobacco products. Each sign shall state that:
(1) Alabama law strictly prohibits the purchase of tobacco products by persons under the age of 19.
(2) Proof of age is required for the purchase of tobacco products.