No person shall buy, sell, trade or traffic in eggs in this state without a license with the following exceptions:
(1) Those who sell only eggs produced by their own flocks, provided such eggs are not sold at an established place of business away from the premises of such producer;
(2) Hatcheries which purchase eggs used exclusively for hatching purposes;
(3) Hotels, restaurants, and other public eating places where all eggs purchased are served in the establishment;
(4) Bakeries, confectioneries, and ice cream manufacturers purchasing eggs for use and used only in the manufacture of their products.