(A) Each person who distributes a commercial feed which guarantees drug, vitamin, or mineral content shall attach a label which states guarantees:
(1) For drugs, other than antibiotics, in terms of percentage by weight;
(2) For each antibiotic in grams per ton of feed when the total of all antibiotics included is less than two thousand grams per ton of feed;
(3) For each antibiotic in grams per pound of feed when the total of all antibiotics included is two thousand grams or more per ton of feed;
(4) In milligrams per pound of feed, in lieu of percentage or gram declarations for drugs, including antibiotics, only in those cases where dosage is given as milligrams per day in the feeding directions;
(5) For minerals, as a percentage of the element with the minimum and maximum percentage of calcium, minimum percentage of phosphorus, minimum and maximum percentage of salt, and the minimum and/or maximum percentages of other minerals being specified. The requirements for a salt guarantee shall apply only if salt is added.
(a) When calcium and salt guarantees are given in the guaranteed analysis, such shall be stated and conform to the following:
(i) When the minimum is below 2.5 per cent, the maximum shall not exceed the minimum by more than 0.5 percentage point.
(ii) When the minimum is 2.5 per cent but less than 5.0 per cent, the maximum shall not exceed the minimum by more than one percentage point.
(iii) When the minimum is above five per cent or greater, the maximum shall not exceed the minimum by more than twenty per cent of the minimum and in no case shall the maximum exceed the minimum by more than five percentage points.
(b) When required, guarantees for minimum potassium, magnesium, sulfur, and maximum fluoride shall be stated in terms of percentage. Other minimum mineral guarantees shall be stated in parts per million (PPM) when the concentration is less than ten thousand PPM and in percentage when the concentration is ten thousand PPM (one per cent) or greater.
(6) For vitamins in milligrams per pound of feed except that:
(a) Vitamin A, other than precursors of vitamin A, shall be stated in international units per pound of feed;
(b) Vitamin D in products offered for poultry feeding, shall be stated in international chick units, per pound of feed;
(c) Vitamin D for other uses shall be stated in international units per pound of feed; and
(d) Vitamin E shall be stated in international units per pound of feed.
(7) For sugars, as invert on dried molasses products or products being sold primarily for their molasses content.
(B) Each person who guarantees the vitamin content of a commercial feed shall on the label, express the vitamin activity of the following vitamins: menadione; riboflavin; dpanthothenic acid; thiamine; niacin; vitamin B-6; folic acid; choline; biotin; inositol; P-amino benzoic acid; ascorbic acid; and carotene, in milligrams per pound.