(1) Employers holding grocery store or beer and/or wine specialty shop licenses exclusively are permitted to allow their employees, between the ages of eighteen and twenty-one years, to sell, stock, and handle liquor in, on or about any establishment holding a license to sell such liquor, if:
(a) There is an adult twenty-one years of age or older on duty supervising the sale of liquor at the licensed premises; and
(b) In the case of spirits, there are at least two adults twenty-one years of age or older on duty supervising the sale of spirits at the licensed premises.
(2) *Employees under twenty-one years of age may make deliveries of beer and/or wine purchased from licensees holding grocery store or beer and/or wine specialty shop licenses exclusively, when delivery is made to cars of customers adjacent to such licensed premises but only, however, when the underage employee is accompanied by the purchaser.