; and (2) subject to subsection (e)(2), harmful to human health or the environment. (c) Identification of ingredients and cosmetics For each nonfunctional constituent on the list under subsection (a), the Secretary shall identify the specific ingredient or cosmetic, or category of ingredients or cosmetics, in which the nonfunctional constituent is known or reasonably expected to be present. (d) Initial list (1) In general In creating the initial list under subsection (a), the Secretary shall— (A) publish a proposed list and provide an opportunity for public comment on such proposed list for a period of 60 days; and (B) not later than 18 months after the date of enactment of the Cosmetic Supply Chain Transparency Act of 2023 , finalize and publish the list. (2) Advisory committee (A) In general Not later than 9 months after the date of enactment of the Cosmetic Supply Chain Transparency Act of 2023 , the Secretary shall convene an advisory committee to advise the Secretary on— (i) creating the initial list under subsection (a); and (ii) best practices related to analytical testing for nonfunctional constituents in cosmetics and ingredients. (B) Membership The membership of the advisory committee convened under subparagraph (A) shall consist of an equal number of— (i) representatives from industry; (ii) representatives from the nonprofit community; (iii) representatives from the scientific community; and (iv) representatives from the medical and public health community. (C) Termination The Secretary shall terminate the advisory committee convened under this paragraph upon the finalization of the initial list pursuant to paragraph (1). (e) Updates Not less than annually after the finalization pursuant to subsection (d) of the initial list under subsection (a), and not less than annually thereafter, the Secretary shall— (1) review the list under subsection (a)