; or (B) affect any such exemptions existing before the date of enactment of this Act. (2) No changes to existing FAA exemptions; exception (A) In general Except as provided in subparagraph (C), the Administrator may not modify or revoke a covered exemption during the period described in subparagraph (D) without the consent of the person holding the covered exemption. (B) Expiration date The expiration date of a covered exemption shall be extended through the date that is 30 days after the end of the period described in subparagraph (D). (C) Exception The Administrator may modify or revoke a covered exemption after the Administrator brings an administrative or legal enforcement action against a person operating a flight under such exemption for— (i) violating the terms of such exemption