Maryland Statutes
Subtitle 7 - Fruits and Vegetables
Section 10-706 - Exemption From Liability for Selling in Improperly Marked Container

Any person who sells any fruit or vegetable in a container not properly marked may not be prosecuted, if he can establish by satisfactory evidence that he was not a party to the grading or packing of the fruit or vegetable in question, and had no knowledge that they were mismarked or illegally packed.