duty in the Armed Forces due to becoming medically disqualified from serving on active duty in the Armed Forces, and may not be used to appoint any other individuals in the excepted service. (2) Voluntary acceptance of appointments A pilot program may not be used as an implicit or explicit basis for compelling an eligible individual to accept an appointment in the excepted service in accordance with this section. (e) Relationship to repayment provisions Completion of a term appointment pursuant to a pilot program shall relieve the eligible individual concerned of any repayment obligation under section 303a(e) or 373 of title 37, United States Code, with respect to the agreement of the individual described in subsection (b)(2)(B). (f) Termination (1) In general The authority to appoint eligible individuals in the excepted service under a pilot program shall expire on the date that is four years after the date of the enactment of this Act. (2) Effect on existing appointments The termination by paragraph (1) of the authority in subsection (a) shall not affect any appointment made under that authority before the termination date specified in paragraph (1) in accordance with the terms of such appointment. 545. Limitation on availability of funds for attendance of Air Force enlisted personnel at Air Force officer professional military education in-residence courses (a) Limitation None of the funds authorized to be appropriated or otherwise available for the Department of the Air Force may be obligated or expended for the purpose of the attendance of Air Force enlisted personnel at Air Force officer professional military education (PME) in-residence courses until the later of— (1) the date on which the Secretary of the Air Force submits to the Committees on Armed Services of the Senate and the House of Representatives, and to the Comptroller General of the United States, a report on the attendance of such personnel at such courses as described in subsection (b)