21 C.F.R. § 137.175
Phosphated flour, phosphated white flour, and phosphated wheat flour, conform to the definition and standard of identity, and are subject to the requirements for label declaration of ingredients, prescribed for flour by § 137.105, except that:
[42 FR 14402, Mar. 15, 1977, as amended at 58 FR 2877, Jan. 6, 1993]