(a) Every person receiving or buying milk or cream on the basis of its chemical or physical constituents shall be, or have in his or her employ, in or on each milk transport tank truck, a licensed milk sampler and grader.
(b) Applications to become a licensed sampler and grader shall be made to the Secretary of the Department of Health upon such forms as he or she may prescribe.
(c) An annual license fee of ten dollars ($10.00) shall be required of each person who qualifies for a license.
(d) The license shall expire on April 1 of each succeeding year.
(e) In order to qualify for a license, the applicant shall satisfy the secretary, either by a written examination or otherwise, that he or she is honest and competent to do sampling work.
(f) An identification card stating his or her name and address and bearing the same number as his or her license shall be issued to him or her at the time his or her license is issued and shall be carried on his or her person at all times while on duty.