(a) It shall be unlawful for any person to manufacture, mix, compound, sell, trade, or offer for sale or trade for human consumption in this state any flour unless the following vitamins and other ingredients are contained in each pound of such product:
(1) Not less than two milligrams and not more than 2.5 milligrams of vitamin B1 (thiamine);
(2) Not less than 1.2 milligrams and not more than 1.5 milligrams of riboflavin;
(3) Not less than 16 milligrams and not more than 20 milligrams of niacin or niacin amide; and
(4) Not less than 13 milligrams and not more than 16.5 milligrams of iron (Fe).
(b) Such products may contain as optional ingredients not less than 500 milligrams and not more than 625 milligrams of calcium per pound and not less than 250 U.S.P. units and not more than 1,000 U.S.P. units of vitamin D per pound.