; (B) the populations which may specifically use such ingredient or not use such ingredient; (C) the area of the human body on which or near which such ingredient should not be used; or (D) such other conditions that may affect the safety of the cosmetic as a whole or in part. (c) Cosmetic safety standard For purposes of this Act, including reviews for safety under this section and section 607, a cosmetic is safe if there is reasonable certainty that the cosmetic is not injurious to users under conditions of use prescribed in labeling or under such conditions of use as are customary or usual. (d) Preemption Upon identification of a cosmetic ingredient or non-functional constituent by the Secretary under subsection (a), no State or local government may establish or continue in effect any law, regulation, order, or other requirement with respect to such ingredient or non-functional constituent, except that a State or local government may continue in effect such a requirement that was in full effect with respect to such ingredient on the date of enactment of the FDA Cosmetic Safety and Modernization Act , or that is exempted from preemption under section 752(b) of the Federal Food, Drug, and Cosmetic Act. (e) Definitions For purposes of this Act— (1) the term non-functional constituent means a substance or chemical, or other contaminant, that was not intentionally added or included in the formula of a cosmetic product and serves no technical purpose, but may be present as a breakdown product or by-product of manufacturing