The Secretary may, after consultation with the sponsor of an application for an investigational new drug under section
355
(i) of this title, the sponsor of an application for a new drug under section
355
(b)(1) of this title, or the holder of an approved application for a drug under section
355
(b)(1) of this title, issue to the sponsor or holder a written request for the conduct of pediatric studies for such drug. In issuing such request, the Secretary shall take into account adequate representation of children of ethnic and racial minorities. Such request to conduct pediatric studies shall be in writing and shall include a timeframe for such studies and a request to the sponsor or holder to propose pediatric labeling resulting from such studies.