; and (4) provide guidance on conducting a swift, orderly transition from the existing appointment processes to the schedule F process established by this title. 4. Executive agency actions (a) Review (1) In general Each Executive agency head shall conduct, not later than 90 days after the date of enactment of this Act, a preliminary review of the positions in the Executive agency that are covered by subchapter II of chapter 75 of title 5, United States Code, and shall conduct a complete review of the positions in the agency not later than 210 days after the date of enactment of this Act. Thereafter, each agency head shall conduct a review of such positions that are covered by subchapter II of chapter 75 of title 5, United States Code, on at least an annual basis. (2) Petitions (A) In general Following a review under paragraph (1), each agency head shall, for positions not excepted from the competitive service by statute, petition the Director to place in schedule F any such competitive service, schedule A, schedule B, or schedule D positions in the Executive agency that the agency head determines to be of a confidential, policy-determining, policy-making, or policy-advocating character and that are not normally subject to change as a result of a Presidential transition. (B) Petition explanation Any petition submitted under subparagraph (A) shall include a written explanation documenting the basis for the agency head’s determination that such position should be placed in schedule F. (3) Determinations (A) In general Following a review under paragraph (1), each agency head shall, for positions excepted from the competitive service by statute, determine which such positions are of a confidential, policy-determining, policy-making, or policy-advocating character and are not normally subject to change as a result of a Presidential transition. (B) Determination effect A position which the agency head determines under subparagraph (A) to be of a confidential, policy-determining, policy-making, or policy-advocating