; and (2) reciprocity of a security clearance at the same level are recognized in 2 weeks or fewer. (b) Certain reinvestigations The Council shall ensure that by December 31, 2021, reinvestigation on a set periodicity is not be required for more than 10 percent of the population that holds a security clearance. (c) Plan Not later than 180 days after the date of the enactment of this Act, the Council shall submit a plan to carry out this section to the appropriate congressional committees. Such plan shall include recommended interim milestones for the goals set forth in subsections (a) and (b) for 2019, 2020, and 2021. (d) Reciprocity defined In this section, the term reciprocity means reciprocal recognition by Federal departments and agencies of eligibility for access to classified information. 605. Security Executive Agent (a) In general The Director of National Intelligence shall serve as the Security Executive Agent for all departments and agencies of the United States. (b) Duties The duties of the Security Executive Agent are as follows: (1) To direct the oversight of investigations, reinvestigations, adjudications, and, as applicable, polygraphs for eligibility for access to classified information or eligibility to hold a sensitive position made by any Federal agency. (2) To review the national security background investigation and adjudication programs of Federal agencies to determine whether such programs are being implemented in accordance with this section. (3) To develop and issue uniform and consistent policies and procedures to ensure the effective, efficient, timely, and secure completion of investigations, polygraphs, and adjudications relating to determinations of eligibility for access to classified information or eligibility to hold a sensitive position. (4) Unless otherwise designated by law, to serve as the final authority to designate a Federal agency or agencies to conduct investigations of persons who are proposed for access to classified information or for eligibility to hold a sensitive