(a) It shall be unlawful for any person to manufacture, mix, compound, sell, or offer for sale, for human consumption in this state, any flour unless the following vitamins and other ingredients are contained in each pound of such flour:

(1) Not less than 2.0 milligrams of vitamin B1 (thiamin);

(2) Not less than 1.2 milligrams of riboflavin;

(3) Not less than 16 milligrams of niacin (nicotinic acid) or niacin amide (nicotinic acid amide); and

(4) Not less than 13 milligrams of iron.

(b) The enrichment of self-rising flour shall require, in addition to the ingredients required in subsection (a) of this Code section, not less than 500 milligrams of calcium.

(c) The Commissioner of Agriculture is authorized to change, or add to, in his discretion, the specifications for ingredients and the amounts thereof, in order that they shall conform to the federal definition of enriched flour when promulgated or as may from time to time be amended.

(d) If other vitamins and minerals are added to flour, they shall be added only in accordance with the regulations of the Commissioner.

(e) Iron shall be added only in forms which are assimilable and harmless and which do not impair the enriched flour.

(f) The enrichment of flour shall be accomplished by a milling process, addition of vitamins from a natural or synthetic source, addition of minerals, or by a combination of these methods, or by any method which is permitted by the Commissioner with respect to flour.