Inspections may be made in car lots or less than car lots and of products loaded in cars or of products not in cars. When any such inspection and classification is made, blank forms of certificates shall be furnished by the division of markets to all State inspectors, to be filled out by them to accompany each carload or less than carload lot of fruits and vegetables to market or to cover any produce inspected at its destination. When State inspection is enforced, such certificate shall name the time of such inspection and the grade of fruits and vegetables and shall contain such other information as may be required by the chief of the division of markets to be shown in the certificate, together with the words, "Graded and packed under State inspection."