Each candler and grader of eggs offered for sale shall obtain a license from the Department of Agriculture at no cost, after demonstrating to the satisfaction of the department his capability and qualifications as an egg candler and grader. The Commissioner of Agriculture is authorized to establish by rule and regulation the minimum qualifications for egg candlers and graders. With the approval of the Commissioner, any person may candle and grade eggs not to exceed 14 days, pending licensing by the department, provided that during this period the employer of such temporary candler and grader shall be accountable for the actions of such candler and grader while acting in such capacity.