Maryland Code, Agriculture § 6-110

Each customer-formula feed or contract feed shall be labeled by invoice. The invoice, delivery ticket, or both shall accompany delivery, be supplied to the distributee at the time of delivery, and bear the following information:

(1) Name and address of the mixer;

(2) Name and address of the distributee;

(3) Date of distribution; and

(4) Number of pounds and name of each registered commercial feed used in the mixture and number of pounds and name of every other feed ingredient added.