(A) The Manager shall have authority to promulgate reasonable rules and regulations governing the operation of municipal liquor stores, subject to the laws of the State of Minnesota, the Charter and ordinances of the city and the conditions and restrictions as hereinafter provided.
(B) No intoxicating liquor or beer shall be sold or served to a minor or an intoxicated person, directly or indirectly. City employees shall have the discretion to refuse to sell or serve any individual when said employee believes in good faith that intoxicating liquor or beer will thereby be made available to an intoxicated person or a minor.
(C) Liquor store personnel shall ensure that persons ineligible to purchase or consume liquor are not permitted to remain on the municipal liquor store premises.
(D) No person under the age of 19 shall be employed in any room where intoxicating liquors are sold at retail, on-sale, except such persons who are performing bus boy, janitorial, or dishwashing services.
(`77 Code, § 4.402) Penalty, see § 1.999