In the case of a public health emergency (as determined under section 247d of this title), the Secretary, on a State by State basis, may, as the circumstances of the emergency reasonably require and for the period of the emergency, grant an extension, or waive application deadlines or compliance with any other requirement, of a grant authorized under section 290cc–21, 300x, or 300x–21 of this title or an allotment authorized under Public Law 99–319 (42 U.S.C. 10801 et seq.).