RS 40:786     

§786.  Enrichment of flour; methods

The enrichment of flour shall be accomplished by a milling process, addition of vitamins from natural or synthetic sources, addition of minerals, or by a combination of these methods or by any method which is permitted by the Federal Security Agency with respect to flour introduced into interstate commerce.  

If other vitamins or minerals than those provided for in R.S. 40:785 are added to flour, they shall be added only in accordance with the regulations of the Federal Security Agency.  

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