(1) except as provided in (2) below, no one under 21 may purchase or attempt to purchase tobacco products or an inhalant delivery system

(2) a person under 21 who is acting under the supervision of a person over 21 may purchase or attempt to purchase tobacco products or an inhalant delivery system for the purpose of testing compliance with a federal law, state law, local law or retailer policy limiting or regulating the distribution or sale of tobacco products or inhalant delivery systems to persons who are under the legal minimum purchase age