No licensee, nor any officer, associate, member, representative, agent or employee of such licensee shall sell, give or deliver alcoholic liquor to any person under the age of twenty-one (21) years, or to any intoxicated person or to any person known by him to be a habitual drunkard, spendthrift, insane, or mentally ill, mentally deficient or in need of mental treatment. No person, after purchasing or otherwise obtaining alcoholic liquor shall sell, give or deliver such alcoholic liquor to another person under the age of twenty-one (21) years, except in the performance of a religious ceremony or service. (235 ILCS 5/6-16)