The Secretary of Defense shall permit an
program participant assigned under this section who, prior to commencing a second academic year of such assignment, voluntarily terminates the assignment or the program participant’s employment with the Agency, to satisfy his obligation under an agreement described in paragraph (1) to reimburse the United States by reimbursement according to a schedule of monthly payments which results in completion of reimbursement by a date five years after the date of termination of the assignment or employment or earlier at the option of the program participant.