; (2) for participants in the exchange program to return the expertise gained through their exchanges to their original agencies at the conclusion of their exchanges; and (3) to improve communication between and integration of the agencies that support the formation and oversight of nuclear weapons policy through lasting relationships across the chain of command. (c) Participants (1) Number of participants The Chairman and the Administrator shall each select not fewer than 5 and not more than 10 participants per year for participation in the exchange program established under subsection (a). The Chairman and the Administrator may determine how many participants to select under this paragraph without regard to the number of participants selected from the other agency. (2) Criteria for selection (A) In general The Chairman and the Administrator shall select participants for the exchange program established under subsection (a) from among mid-career employees and based on— (i) the qualifications and desire to participate in the program of the employee