(1) A person who is at least eighteen (18) years of age but under the age of twenty-one (21) years may possess and consume light wine or beer with the consent of his parent or legal guardian in the presence of his parent or legal guardian, and it shall not be unlawful for the parent, legal guardian or spouse of such person to furnish light wine or beer to such person who is at least eighteen (18) years of age.
(2) A person who is at least eighteen (18) years of age and who is serving in the armed services of the United States may lawfully possess and consume light wine or beer on military property where the consumption of light wine or beer is allowed.
(3) A person who is under twenty-one (21) years of age shall not be deemed to unlawfully possess or furnish light wine or beer, if in the scope of his employment such person:
(a) Clears or buses tables that have glasses or other containers that contain or did contain light wine or beer;
(b) Waits on tables by taking orders for light wine or beer; or
(c) Stocks, bags or otherwise handles purchases of light wine or beer at a store.