A commercial feed shall be labeled as follows:

(1) In case of a commercial feed, except a customer-formula feed, it shall be accompanied by a label bearing the following information:

(a) The product name, and the brand name if any, under which the commercial feed is distributed. Single ingredient feeds shall have a product name in accordance with the designated definition of feed ingredients as recognized by the Association of American Feed Control Officials unless the director designates otherwise;

(b) The guaranteed analysis stated in such terms as the director by rule determines is required to advise the user of the composition of the feed or to support claims made in the labeling, and in all cases the substances or elements shall be determinable by laboratory methods from generally recognized sources such as the methods published by the Association of Official Analytical Chemists;

(c) The name of each ingredient used in the manufacture of the commercial feed shall be that established by rule or the common or usual name. The director by rule may permit the use of a collective term for a group of ingredients which perform a similar function, or the director may exempt such commercial feeds, or any group thereof, from this requirement of an ingredient statement if the director finds that such statement is not required in the interest of consumers;

(d) The name and principal mailing address of the manufacturer or the person responsible for distributing the commercial feed;

(e) Adequate directions for use for all commercial feeds containing drugs and for such other feeds as the director may require by rule as necessary for their safe and effective use;

(f) Such precautionary statements as the director by rule determines are necessary for the safe and effective use of the commercial feed;

(g) The quantity statement;

(2) In the case of a customer-formula feed, it shall be accompanied by a label, invoice, delivery slip, or other shipping document, bearing the following information:

(a) Name and address of the manufacturer;

(b) Name and address of the purchaser;

(c) Date of delivery;

(d) The product name and brand name, if any, and the net weight of each commercial feed used in the mixture, and the net weight of each other ingredient used;

(e) Adequate directions for use for all customer-formula feeds containing drugs and for such other feeds as the director may require by rule as necessary for their safe and effective use;

(f) Such warning or caution statements as the director by rule determines are necessary for the safe and effective use of the customer-formula feed.