; or (ii) insufficient information exists to place the ingredient on either such list. (C) Guidance in the case of insufficient information If the Secretary determines under subparagraph (B) that, with respect to an ingredient, insufficient information exists to place such ingredient on either of the lists under subsection (b) or subsection (c) , the Secretary shall provide guidance on the data and information (including minimum data requirements and safety testing protocols) that the Secretary requires to evaluate whether the ingredient meets the safety standard under section 614(a) for purposes of placing such ingredient on such a list. (D) Comment period Upon issuing the determination under subparagraph (B) , and, if applicable, the guidance under subparagraph (C) , the Secretary shall provide a period of not less than 60 days for public comment on the determination before applying such determination to an ingredient, except that a shorter period for comment may be provided if the Secretary— (i) finds that it would be in the public interest to have a shorter period; and (ii) publicly declares the reasons for such finding. (4) Response to inadequate information Not later than 18 months after the date that the Secretary issues guidance under paragraph (3)(C) with respect to an ingredient subject to a determination under paragraph (3)(B) , a brand owner using such ingredient in a cosmetic shall— (A) reformulate such cosmetic to eliminate the use of the ingredient