A commercial feed, regardless of the container in which it is shipped or sold, 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 net weight.
b. The product name and the brand name, if any, under which the commercial feed is distributed.
c. The guaranteed analysis stated in such terms as the commissioner by regulation determines is required to advise the user of the composition of the feed or to support claims made in the labeling. In all cases, the substances or elements must be determinable by laboratory methods such as the methods published by the Association of Official Analytical Chemists.
d. The common or usual name of each ingredient used in the manufacture of the commercial feed; provided, that the commissioner, by regulation, may permit the use of a collective term for a group of ingredients which perform a similar function, or he may exempt such commercial feeds, or any group thereof, from this requirement of an ingredient statement if he finds that such statement is not required in the interest of consumers.
e. The name and principal mailing address of the manufacturer or the person responsible for distributing the commercial feed.
f. Adequate directions for use for all commercial feeds containing drugs and for such other feeds as the commissioner may require by regulation as necessary for their safe and effective use.
g. Such precautionary statements as the commissioner by regulation determines are necessary for the safe and effective use of the commercial feed.
(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, 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 commissioner may require by regulation as necessary for their safe and effective use.
f. Such precautionary statements as the commissioner by regulation determines are necessary for the safe and effective use of the customer-formula feed.
(3) In the case of a "vertical-integrator feed" all the conditions specified under subdivision (2) of this section for the customer-formula feed will apply except that the records will be kept at the place of manufacture and need not accompany the feed as it is transported to point of use, except as required by the Federal Food, Drug and Cosmetic Act (21 U.S.C. Section 301, et seq.).