; (C) a trade or business association a majority of whose members manufacture, produce, or wholesale in the United States a domestic product that has the same physical characteristics and uses as the product for which a modification of an existing duty is sought; or (D) a member of the Committee on Ways and Means of the House of Representatives or a member of the Committee on Finance of the Senate. (c) Determination by USTR Not later than 45 days after the date on which a petition is filed under subsection (b), the United States Trade Representative shall— (1) determine whether the petition alleges the elements necessary for the withdrawal of the modification of an existing duty under subsection (a)