This chapter does not prohibit the manufacture or sale of proprietary foods that are clearly not imitation milk, imitation milk products, or filled dairy products; which do not contain imitation milk, imitation milk product, or filled dairy product; and which are not conducive to substitution, confusion, deception, and fraud upon the purchasers of milk, milk products, or filled dairy products by their manufacture or sale.
N.D.C.C. § 4.1-25-39