; (B) describes how the modification will reduce costs incurred by the taxpayers of the United States; (C) certifies that the modification will be seamless, as described in paragraph (1)(B); and (D) certifies that the modification will have as minimal an adverse impact as possible on the public and stakeholders. (3) Congressional authority The Director may begin making a modification proposed under this subsection on the date that is 90 days after the date on which the Director submits to Congress the notice required under paragraph (2) with respect to that modification, unless Congress, during the 90-day period beginning on the date on which the Director submits that notice— (A) finds that the modification is not justified in light of the information contained in that notice; and (B) enacts legislation disapproving of the proposed modification. .